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FastMM4

Fast Memory Manager FastMM-Title.jpg with title only

Description:

A fast replacement memory manager for Embarcadero Delphi applications that scales well under multi-threaded usage, is not prone to memory fragmentation, and supports shared memory without the use of external .DLL files.

Homepage:

https://github.com/pleriche/FastMM4

Advantages:

  • Fast
  • Low overhead. FastMM is designed for an average of 5% and maximum of 10% overhead per block.
  • Supports up to 3GB of user mode address space under Windows 32-bit and 4GB under Windows 64-bit. Add the "$SetPEFlags $20" option (in curly braces) to your .dpr to enable this.
  • Highly aligned memory blocks. Can be configured for either 8-byte or 16-byte alignment.
  • Good scaling under multi-threaded applications
  • Intelligent reallocations. Avoids slow memory move operations through not performing unneccesary downsizes and by having a minimum percentage block size growth factor when an in-place block upsize is not possible.
  • Resistant to address space fragmentation
  • No external DLL required when sharing memory between the application and external libraries (provided both use this memory manager)
  • Optionally reports memory leaks on program shutdown. (This check can be set to be performed only if Delphi is currently running on the machine, so end users won't be bothered by the error message.)
  • Supports Delphi 4 (or later), C++ Builder 4 (or later), Kylix 3.

Usage:

Delphi:

Place this unit as the very first unit under the "uses" section in your project's .dpr file. When sharing memory between an application and a DLL (e.g. when passing a long string or dynamic array to a DLL function), both the main application and the DLL must be compiled using this memory manager (with the required conditional defines set).

There are some conditional defines (inside FastMM4Options.inc) that may be used to tweak the memory manager. To enable support for a user mode address space greater than 2GB you will have to use the EditBin* tool to set the LARGE_ADDRESS_AWARE flag in the EXE header. This informs Windows x64 or Windows 32-bit (with the /3GB option set) that the application supports an address space larger than 2GB (up to 4GB). In Delphi 6 and later you can also specify this flag through the compiler directive {$SetPEFlags $20}

*The EditBin tool ships with the MS Visual C compiler.

C++ Builder:

Refer to the instructions inside FastMM4BCB.cpp.

About

A memory manager for Delphi and C++ Builder with powerful debugging facilities

Resources

Readme
Activity

Stars

495 stars

Watchers

86 watching

Forks

172 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
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FastMM4
Fast Memory Manager
FastMM-Title.jpg with title only
Description:
A fast replacement memory manager for Embarcadero Delphi applications
that scales well under multi-threaded usage, is not prone to memory
fragmentation, and supports shared memory without the use of external .DLL
files.
Homepage:
https://github.com/pleriche/FastMM4
Advantages:
  • Fast
  • Low overhead. FastMM is designed for an average of 5% and maximum of 10%
overhead per block.
  • Supports up to 3GB of user mode address space under Windows 32-bit and 4GB
under Windows 64-bit. Add the "$SetPEFlags $20" option (in curly braces)
to your .dpr to enable this.
  • Highly aligned memory blocks. Can be configured for either 8-byte or 16-byte
alignment.
  • Good scaling under multi-threaded applications
  • Intelligent reallocations. Avoids slow memory move operations through
not performing unneccesary downsizes and by having a minimum percentage
block size growth factor when an in-place block upsize is not possible.
  • Resistant to address space fragmentation
  • No external DLL required when sharing memory between the application and
external libraries (provided both use this memory manager)
  • Optionally reports memory leaks on program shutdown. (This check can be set
to be performed only if Delphi is currently running on the machine, so end
users won't be bothered by the error message.)
  • Supports Delphi 4 (or later), C++ Builder 4 (or later), Kylix 3.
Usage:
Delphi:
Place this unit as the very first unit under the "uses" section in your
project's .dpr file. When sharing memory between an application and a DLL
(e.g. when passing a long string or dynamic array to a DLL function), both the
main application and the DLL must be compiled using this memory manager (with
the required conditional defines set).
There are some conditional defines
(inside FastMM4Options.inc) that may be used to tweak the memory manager. To
enable support for a user mode address space greater than 2GB you will have to
use the EditBin* tool to set the LARGE_ADDRESS_AWARE flag in the EXE header.
This informs Windows x64 or Windows 32-bit (with the /3GB option set) that the
application supports an address space larger than 2GB (up to 4GB). In Delphi 6
and later you can also specify this flag through the compiler directive
{$SetPEFlags $20}
*The EditBin tool ships with the MS Visual C compiler.
C++ Builder:
Refer to the instructions inside FastMM4BCB.cpp.
About
A memory manager for Delphi and C++ Builder with powerful debugging facilities
Resources
Readme
Activity
Stars
495 stars
Watchers
86 watching
Forks
172 forks
Report repository
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Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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FastMM4
Fast Memory Manager
FastMM-Title.jpg with title only
Description:
A fast replacement memory manager for Embarcadero Delphi applications
that scales well under multi-threaded usage, is not prone to memory
fragmentation, and supports shared memory without the use of external .DLL
files.
Homepage:
https://github.com/pleriche/FastMM4
Advantages:
  • Fast
  • Low overhead. FastMM is designed for an average of 5% and maximum of 10%
overhead per block.
  • Supports up to 3GB of user mode address space under Windows 32-bit and 4GB
under Windows 64-bit. Add the "$SetPEFlags $20" option (in curly braces)
to your .dpr to enable this.
  • Highly aligned memory blocks. Can be configured for either 8-byte or 16-byte
alignment.
  • Good scaling under multi-threaded applications
  • Intelligent reallocations. Avoids slow memory move operations through
not performing unneccesary downsizes and by having a minimum percentage
block size growth factor when an in-place block upsize is not possible.
  • Resistant to address space fragmentation
  • No external DLL required when sharing memory between the application and
external libraries (provided both use this memory manager)
  • Optionally reports memory leaks on program shutdown. (This check can be set
to be performed only if Delphi is currently running on the machine, so end
users won't be bothered by the error message.)
  • Supports Delphi 4 (or later), C++ Builder 4 (or later), Kylix 3.
Usage:
Delphi:
Place this unit as the very first unit under the "uses" section in your
project's .dpr file. When sharing memory between an application and a DLL
(e.g. when passing a long string or dynamic array to a DLL function), both the
main application and the DLL must be compiled using this memory manager (with
the required conditional defines set).
There are some conditional defines
(inside FastMM4Options.inc) that may be used to tweak the memory manager. To
enable support for a user mode address space greater than 2GB you will have to
use the EditBin* tool to set the LARGE_ADDRESS_AWARE flag in the EXE header.
This informs Windows x64 or Windows 32-bit (with the /3GB option set) that the
application supports an address space larger than 2GB (up to 4GB). In Delphi 6
and later you can also specify this flag through the compiler directive
{$SetPEFlags $20}
*The EditBin tool ships with the MS Visual C compiler.
C++ Builder:
Refer to the instructions inside FastMM4BCB.cpp.
About
A memory manager for Delphi and C++ Builder with powerful debugging facilities
Resources
Readme
Activity
Stars
495 stars
Watchers
86 watching
Forks
172 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
FastMM4
Fast Memory Manager
FastMM-Title.jpg with title only
Description:
A fast replacement memory manager for Embarcadero Delphi applications
that scales well under multi-threaded usage, is not prone to memory
fragmentation, and supports shared memory without the use of external .DLL
files.
Homepage:
https://github.com/pleriche/FastMM4
Advantages:
  • Fast
  • Low overhead. FastMM is designed for an average of 5% and maximum of 10%
overhead per block.
  • Supports up to 3GB of user mode address space under Windows 32-bit and 4GB
under Windows 64-bit. Add the "$SetPEFlags $20" option (in curly braces)
to your .dpr to enable this.
  • Highly aligned memory blocks. Can be configured for either 8-byte or 16-byte
alignment.
  • Good scaling under multi-threaded applications
  • Intelligent reallocations. Avoids slow memory move operations through
not performing unneccesary downsizes and by having a minimum percentage
block size growth factor when an in-place block upsize is not possible.
  • Resistant to address space fragmentation
  • No external DLL required when sharing memory between the application and
external libraries (provided both use this memory manager)
  • Optionally reports memory leaks on program shutdown. (This check can be set
to be performed only if Delphi is currently running on the machine, so end
users won't be bothered by the error message.)
  • Supports Delphi 4 (or later), C++ Builder 4 (or later), Kylix 3.
Usage:
Delphi:
Place this unit as the very first unit under the "uses" section in your
project's .dpr file. When sharing memory between an application and a DLL
(e.g. when passing a long string or dynamic array to a DLL function), both the
main application and the DLL must be compiled using this memory manager (with
the required conditional defines set).
There are some conditional defines
(inside FastMM4Options.inc) that may be used to tweak the memory manager. To
enable support for a user mode address space greater than 2GB you will have to
use the EditBin* tool to set the LARGE_ADDRESS_AWARE flag in the EXE header.
This informs Windows x64 or Windows 32-bit (with the /3GB option set) that the
application supports an address space larger than 2GB (up to 4GB). In Delphi 6
and later you can also specify this flag through the compiler directive
{$SetPEFlags $20}
*The EditBin tool ships with the MS Visual C compiler.
C++ Builder:
Refer to the instructions inside FastMM4BCB.cpp.
About
A memory manager for Delphi and C++ Builder with powerful debugging facilities
Resources
Readme
Activity
Stars
495 stars
Watchers
86 watching
Forks
172 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
FastMM4
Fast Memory Manager
FastMM-Title.jpg with title only
Description:
A fast replacement memory manager for Embarcadero Delphi applications
that scales well under multi-threaded usage, is not prone to memory
fragmentation, and supports shared memory without the use of external .DLL
files.
Homepage:
https://github.com/pleriche/FastMM4
Advantages:
  • Fast
  • Low overhead. FastMM is designed for an average of 5% and maximum of 10%
overhead per block.
  • Supports up to 3GB of user mode address space under Windows 32-bit and 4GB
under Windows 64-bit. Add the "$SetPEFlags $20" option (in curly braces)
to your .dpr to enable this.
  • Highly aligned memory blocks. Can be configured for either 8-byte or 16-byte
alignment.
  • Good scaling under multi-threaded applications
  • Intelligent reallocations. Avoids slow memory move operations through
not performing unneccesary downsizes and by having a minimum percentage
block size growth factor when an in-place block upsize is not possible.
  • Resistant to address space fragmentation
  • No external DLL required when sharing memory between the application and
external libraries (provided both use this memory manager)
  • Optionally reports memory leaks on program shutdown. (This check can be set
to be performed only if Delphi is currently running on the machine, so end
users won't be bothered by the error message.)
  • Supports Delphi 4 (or later), C++ Builder 4 (or later), Kylix 3.
Usage:
Delphi:
Place this unit as the very first unit under the "uses" section in your
project's .dpr file. When sharing memory between an application and a DLL
(e.g. when passing a long string or dynamic array to a DLL function), both the
main application and the DLL must be compiled using this memory manager (with
the required conditional defines set).
There are some conditional defines
(inside FastMM4Options.inc) that may be used to tweak the memory manager. To
enable support for a user mode address space greater than 2GB you will have to
use the EditBin* tool to set the LARGE_ADDRESS_AWARE flag in the EXE header.
This informs Windows x64 or Windows 32-bit (with the /3GB option set) that the
application supports an address space larger than 2GB (up to 4GB). In Delphi 6
and later you can also specify this flag through the compiler directive
{$SetPEFlags $20}
*The EditBin tool ships with the MS Visual C compiler.
C++ Builder:
Refer to the instructions inside FastMM4BCB.cpp.
About
A memory manager for Delphi and C++ Builder with powerful debugging facilities
Resources
Readme
Activity
Stars
495 stars
Watchers
86 watching
Forks
172 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
FastMM4
Fast Memory Manager
FastMM-Title.jpg with title only
Description:
A fast replacement memory manager for Embarcadero Delphi applications
that scales well under multi-threaded usage, is not prone to memory
fragmentation, and supports shared memory without the use of external .DLL
files.
Homepage:
https://github.com/pleriche/FastMM4
Advantages:
  • Fast
  • Low overhead. FastMM is designed for an average of 5% and maximum of 10%
overhead per block.
  • Supports up to 3GB of user mode address space under Windows 32-bit and 4GB
under Windows 64-bit. Add the "$SetPEFlags $20" option (in curly braces)
to your .dpr to enable this.
  • Highly aligned memory blocks. Can be configured for either 8-byte or 16-byte
alignment.
  • Good scaling under multi-threaded applications
  • Intelligent reallocations. Avoids slow memory move operations through
not performing unneccesary downsizes and by having a minimum percentage
block size growth factor when an in-place block upsize is not possible.
  • Resistant to address space fragmentation
  • No external DLL required when sharing memory between the application and
external libraries (provided both use this memory manager)
  • Optionally reports memory leaks on program shutdown. (This check can be set
to be performed only if Delphi is currently running on the machine, so end
users won't be bothered by the error message.)
  • Supports Delphi 4 (or later), C++ Builder 4 (or later), Kylix 3.
Usage:
Delphi:
Place this unit as the very first unit under the "uses" section in your
project's .dpr file. When sharing memory between an application and a DLL
(e.g. when passing a long string or dynamic array to a DLL function), both the
main application and the DLL must be compiled using this memory manager (with
the required conditional defines set).
There are some conditional defines
(inside FastMM4Options.inc) that may be used to tweak the memory manager. To
enable support for a user mode address space greater than 2GB you will have to
use the EditBin* tool to set the LARGE_ADDRESS_AWARE flag in the EXE header.
This informs Windows x64 or Windows 32-bit (with the /3GB option set) that the
application supports an address space larger than 2GB (up to 4GB). In Delphi 6
and later you can also specify this flag through the compiler directive
{$SetPEFlags $20}
*The EditBin tool ships with the MS Visual C compiler.
C++ Builder:
Refer to the instructions inside FastMM4BCB.cpp.
About
A memory manager for Delphi and C++ Builder with powerful debugging facilities
Resources
Readme
Activity
Stars
495 stars
Watchers
86 watching
Forks
172 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
FastMM4
Fast Memory Manager
FastMM-Title.jpg with title only
Description:
A fast replacement memory manager for Embarcadero Delphi applications
that scales well under multi-threaded usage, is not prone to memory
fragmentation, and supports shared memory without the use of external .DLL
files.
Homepage:
https://github.com/pleriche/FastMM4
Advantages:
  • Fast
  • Low overhead. FastMM is designed for an average of 5% and maximum of 10%
overhead per block.
  • Supports up to 3GB of user mode address space under Windows 32-bit and 4GB
under Windows 64-bit. Add the "$SetPEFlags $20" option (in curly braces)
to your .dpr to enable this.
  • Highly aligned memory blocks. Can be configured for either 8-byte or 16-byte
alignment.
  • Good scaling under multi-threaded applications
  • Intelligent reallocations. Avoids slow memory move operations through
not performing unneccesary downsizes and by having a minimum percentage
block size growth factor when an in-place block upsize is not possible.
  • Resistant to address space fragmentation
  • No external DLL required when sharing memory between the application and
external libraries (provided both use this memory manager)
  • Optionally reports memory leaks on program shutdown. (This check can be set
to be performed only if Delphi is currently running on the machine, so end
users won't be bothered by the error message.)
  • Supports Delphi 4 (or later), C++ Builder 4 (or later), Kylix 3.
Usage:
Delphi:
Place this unit as the very first unit under the "uses" section in your
project's .dpr file. When sharing memory between an application and a DLL
(e.g. when passing a long string or dynamic array to a DLL function), both the
main application and the DLL must be compiled using this memory manager (with
the required conditional defines set).
There are some conditional defines
(inside FastMM4Options.inc) that may be used to tweak the memory manager. To
enable support for a user mode address space greater than 2GB you will have to
use the EditBin* tool to set the LARGE_ADDRESS_AWARE flag in the EXE header.
This informs Windows x64 or Windows 32-bit (with the /3GB option set) that the
application supports an address space larger than 2GB (up to 4GB). In Delphi 6
and later you can also specify this flag through the compiler directive
{$SetPEFlags $20}
*The EditBin tool ships with the MS Visual C compiler.
C++ Builder:
Refer to the instructions inside FastMM4BCB.cpp.
About
A memory manager for Delphi and C++ Builder with powerful debugging facilities
Resources
Readme
Activity
Stars
495 stars
Watchers
86 watching
Forks
172 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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FastMM4
Fast Memory Manager
FastMM-Title.jpg with title only
Description:
A fast replacement memory manager for Embarcadero Delphi applications
that scales well under multi-threaded usage, is not prone to memory
fragmentation, and supports shared memory without the use of external .DLL
files.
Homepage:
https://github.com/pleriche/FastMM4
Advantages:
  • Fast
  • Low overhead. FastMM is designed for an average of 5% and maximum of 10%
overhead per block.
  • Supports up to 3GB of user mode address space under Windows 32-bit and 4GB
under Windows 64-bit. Add the "$SetPEFlags $20" option (in curly braces)
to your .dpr to enable this.
  • Highly aligned memory blocks. Can be configured for either 8-byte or 16-byte
alignment.
  • Good scaling under multi-threaded applications
  • Intelligent reallocations. Avoids slow memory move operations through
not performing unneccesary downsizes and by having a minimum percentage
block size growth factor when an in-place block upsize is not possible.
  • Resistant to address space fragmentation
  • No external DLL required when sharing memory between the application and
external libraries (provided both use this memory manager)
  • Optionally reports memory leaks on program shutdown. (This check can be set
to be performed only if Delphi is currently running on the machine, so end
users won't be bothered by the error message.)
  • Supports Delphi 4 (or later), C++ Builder 4 (or later), Kylix 3.
Usage:
Delphi:
Place this unit as the very first unit under the "uses" section in your
project's .dpr file. When sharing memory between an application and a DLL
(e.g. when passing a long string or dynamic array to a DLL function), both the
main application and the DLL must be compiled using this memory manager (with
the required conditional defines set).
There are some conditional defines
(inside FastMM4Options.inc) that may be used to tweak the memory manager. To
enable support for a user mode address space greater than 2GB you will have to
use the EditBin* tool to set the LARGE_ADDRESS_AWARE flag in the EXE header.
This informs Windows x64 or Windows 32-bit (with the /3GB option set) that the
application supports an address space larger than 2GB (up to 4GB). In Delphi 6
and later you can also specify this flag through the compiler directive
{$SetPEFlags $20}
*The EditBin tool ships with the MS Visual C compiler.
C++ Builder:
Refer to the instructions inside FastMM4BCB.cpp.
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A memory manager for Delphi and C++ Builder with powerful debugging facilities
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