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ExceptionsPerformance

Benchmarking of using exceptions to control code flow. There are two ways to get the value from list of strings (in this solution), one is searching for string using loop and another is using exceptions to tell code that value is not found. These ways are created to simulate behaviour of ADO .NET DataReader class, where are two ways to get whether data row contains field or not. They are:

  • GetOrdinal - getting index by field name. Throws exception when field not found.
  • Loop with GetFieldName. No exceptions are thrown.

Start Benchmarker project from your IDE and look at results. These are results from my laptop:

 Method | Mean | StdErr | StdDev | Rank |
--------------------------------- |---------------- |-------------- |--------------- |----- |
WithLoop_100PercentNotFound | 5,301.9258 ns | 53.0328 ns | 339.5758 ns | 4 |
WithLoop_50PercentNotFound | 6,160.5118 ns | 72.6483 ns | 355.9023 ns | 5 |
WithLoop_10PercentNotFound | 4,097.5560 ns | 40.5199 ns | 249.7812 ns | 3 |
WithLoop_AllFound | 3,048.1326 ns | 30.3764 ns | 163.5820 ns | 2 |
WithException_100PercentNotFound | 157,972.4183 ns | 1,694.8235 ns | 11,619.1246 ns | 8 |
WithException_50PercentNotFound | 78,544.0070 ns | 784.2743 ns | 5,319.2074 ns | 7 |
WithException_10PercentNotFound | 15,873.0764 ns | 122.1438 ns | 440.3958 ns | 6 |
WithException_AllFound | 530.6526 ns | 6.0316 ns | 25.5897 ns | 1 |

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, '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" + '

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ExceptionsPerformance
Benchmarking of using exceptions to control code flow.
There are two ways to get the value from list of strings (in this solution), one is searching for string using loop and another is using exceptions to tell code that value is not found.
These ways are created to simulate behaviour of ADO .NET DataReader class, where are two ways to get whether data row contains field or not.
They are:
  • GetOrdinal - getting index by field name. Throws exception when field not found.
  • Loop with GetFieldName. No exceptions are thrown.
Start Benchmarker project from your IDE and look at results. These are results from my laptop:
 Method | Mean | StdErr | StdDev | Rank |
--------------------------------- |---------------- |-------------- |--------------- |----- |
WithLoop_100PercentNotFound | 5,301.9258 ns | 53.0328 ns | 339.5758 ns | 4 |
WithLoop_50PercentNotFound | 6,160.5118 ns | 72.6483 ns | 355.9023 ns | 5 |
WithLoop_10PercentNotFound | 4,097.5560 ns | 40.5199 ns | 249.7812 ns | 3 |
WithLoop_AllFound | 3,048.1326 ns | 30.3764 ns | 163.5820 ns | 2 |
WithException_100PercentNotFound | 157,972.4183 ns | 1,694.8235 ns | 11,619.1246 ns | 8 |
WithException_50PercentNotFound | 78,544.0070 ns | 784.2743 ns | 5,319.2074 ns | 7 |
WithException_10PercentNotFound | 15,873.0764 ns | 122.1438 ns | 440.3958 ns | 6 |
WithException_AllFound | 530.6526 ns | 6.0316 ns | 25.5897 ns | 1 |

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, '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('^' + ".*" + '

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ExceptionsPerformance
Benchmarking of using exceptions to control code flow.
There are two ways to get the value from list of strings (in this solution), one is searching for string using loop and another is using exceptions to tell code that value is not found.
These ways are created to simulate behaviour of ADO .NET DataReader class, where are two ways to get whether data row contains field or not.
They are:
  • GetOrdinal - getting index by field name. Throws exception when field not found.
  • Loop with GetFieldName. No exceptions are thrown.
Start Benchmarker project from your IDE and look at results. These are results from my laptop:
 Method | Mean | StdErr | StdDev | Rank |
--------------------------------- |---------------- |-------------- |--------------- |----- |
WithLoop_100PercentNotFound | 5,301.9258 ns | 53.0328 ns | 339.5758 ns | 4 |
WithLoop_50PercentNotFound | 6,160.5118 ns | 72.6483 ns | 355.9023 ns | 5 |
WithLoop_10PercentNotFound | 4,097.5560 ns | 40.5199 ns | 249.7812 ns | 3 |
WithLoop_AllFound | 3,048.1326 ns | 30.3764 ns | 163.5820 ns | 2 |
WithException_100PercentNotFound | 157,972.4183 ns | 1,694.8235 ns | 11,619.1246 ns | 8 |
WithException_50PercentNotFound | 78,544.0070 ns | 784.2743 ns | 5,319.2074 ns | 7 |
WithException_10PercentNotFound | 15,873.0764 ns | 122.1438 ns | 440.3958 ns | 6 |
WithException_AllFound | 530.6526 ns | 6.0316 ns | 25.5897 ns | 1 |

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, '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('^' + ".*" + '

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ExceptionsPerformance
Benchmarking of using exceptions to control code flow.
There are two ways to get the value from list of strings (in this solution), one is searching for string using loop and another is using exceptions to tell code that value is not found.
These ways are created to simulate behaviour of ADO .NET DataReader class, where are two ways to get whether data row contains field or not.
They are:
  • GetOrdinal - getting index by field name. Throws exception when field not found.
  • Loop with GetFieldName. No exceptions are thrown.
Start Benchmarker project from your IDE and look at results. These are results from my laptop:
 Method | Mean | StdErr | StdDev | Rank |
--------------------------------- |---------------- |-------------- |--------------- |----- |
WithLoop_100PercentNotFound | 5,301.9258 ns | 53.0328 ns | 339.5758 ns | 4 |
WithLoop_50PercentNotFound | 6,160.5118 ns | 72.6483 ns | 355.9023 ns | 5 |
WithLoop_10PercentNotFound | 4,097.5560 ns | 40.5199 ns | 249.7812 ns | 3 |
WithLoop_AllFound | 3,048.1326 ns | 30.3764 ns | 163.5820 ns | 2 |
WithException_100PercentNotFound | 157,972.4183 ns | 1,694.8235 ns | 11,619.1246 ns | 8 |
WithException_50PercentNotFound | 78,544.0070 ns | 784.2743 ns | 5,319.2074 ns | 7 |
WithException_10PercentNotFound | 15,873.0764 ns | 122.1438 ns | 440.3958 ns | 6 |
WithException_AllFound | 530.6526 ns | 6.0316 ns | 25.5897 ns | 1 |

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, '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" + '

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ExceptionsPerformance
Benchmarking of using exceptions to control code flow.
There are two ways to get the value from list of strings (in this solution), one is searching for string using loop and another is using exceptions to tell code that value is not found.
These ways are created to simulate behaviour of ADO .NET DataReader class, where are two ways to get whether data row contains field or not.
They are:
  • GetOrdinal - getting index by field name. Throws exception when field not found.
  • Loop with GetFieldName. No exceptions are thrown.
Start Benchmarker project from your IDE and look at results. These are results from my laptop:
 Method | Mean | StdErr | StdDev | Rank |
--------------------------------- |---------------- |-------------- |--------------- |----- |
WithLoop_100PercentNotFound | 5,301.9258 ns | 53.0328 ns | 339.5758 ns | 4 |
WithLoop_50PercentNotFound | 6,160.5118 ns | 72.6483 ns | 355.9023 ns | 5 |
WithLoop_10PercentNotFound | 4,097.5560 ns | 40.5199 ns | 249.7812 ns | 3 |
WithLoop_AllFound | 3,048.1326 ns | 30.3764 ns | 163.5820 ns | 2 |
WithException_100PercentNotFound | 157,972.4183 ns | 1,694.8235 ns | 11,619.1246 ns | 8 |
WithException_50PercentNotFound | 78,544.0070 ns | 784.2743 ns | 5,319.2074 ns | 7 |
WithException_10PercentNotFound | 15,873.0764 ns | 122.1438 ns | 440.3958 ns | 6 |
WithException_AllFound | 530.6526 ns | 6.0316 ns | 25.5897 ns | 1 |

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, '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('^' + ".*" + '

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ExceptionsPerformance
Benchmarking of using exceptions to control code flow.
There are two ways to get the value from list of strings (in this solution), one is searching for string using loop and another is using exceptions to tell code that value is not found.
These ways are created to simulate behaviour of ADO .NET DataReader class, where are two ways to get whether data row contains field or not.
They are:
  • GetOrdinal - getting index by field name. Throws exception when field not found.
  • Loop with GetFieldName. No exceptions are thrown.
Start Benchmarker project from your IDE and look at results. These are results from my laptop:
 Method | Mean | StdErr | StdDev | Rank |
--------------------------------- |---------------- |-------------- |--------------- |----- |
WithLoop_100PercentNotFound | 5,301.9258 ns | 53.0328 ns | 339.5758 ns | 4 |
WithLoop_50PercentNotFound | 6,160.5118 ns | 72.6483 ns | 355.9023 ns | 5 |
WithLoop_10PercentNotFound | 4,097.5560 ns | 40.5199 ns | 249.7812 ns | 3 |
WithLoop_AllFound | 3,048.1326 ns | 30.3764 ns | 163.5820 ns | 2 |
WithException_100PercentNotFound | 157,972.4183 ns | 1,694.8235 ns | 11,619.1246 ns | 8 |
WithException_50PercentNotFound | 78,544.0070 ns | 784.2743 ns | 5,319.2074 ns | 7 |
WithException_10PercentNotFound | 15,873.0764 ns | 122.1438 ns | 440.3958 ns | 6 |
WithException_AllFound | 530.6526 ns | 6.0316 ns | 25.5897 ns | 1 |

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Benchmarking of using exceptions to control code flow
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, '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('^' + ".*" + '

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ExceptionsPerformance
Benchmarking of using exceptions to control code flow.
There are two ways to get the value from list of strings (in this solution), one is searching for string using loop and another is using exceptions to tell code that value is not found.
These ways are created to simulate behaviour of ADO .NET DataReader class, where are two ways to get whether data row contains field or not.
They are:
  • GetOrdinal - getting index by field name. Throws exception when field not found.
  • Loop with GetFieldName. No exceptions are thrown.
Start Benchmarker project from your IDE and look at results. These are results from my laptop:
 Method | Mean | StdErr | StdDev | Rank |
--------------------------------- |---------------- |-------------- |--------------- |----- |
WithLoop_100PercentNotFound | 5,301.9258 ns | 53.0328 ns | 339.5758 ns | 4 |
WithLoop_50PercentNotFound | 6,160.5118 ns | 72.6483 ns | 355.9023 ns | 5 |
WithLoop_10PercentNotFound | 4,097.5560 ns | 40.5199 ns | 249.7812 ns | 3 |
WithLoop_AllFound | 3,048.1326 ns | 30.3764 ns | 163.5820 ns | 2 |
WithException_100PercentNotFound | 157,972.4183 ns | 1,694.8235 ns | 11,619.1246 ns | 8 |
WithException_50PercentNotFound | 78,544.0070 ns | 784.2743 ns | 5,319.2074 ns | 7 |
WithException_10PercentNotFound | 15,873.0764 ns | 122.1438 ns | 440.3958 ns | 6 |
WithException_AllFound | 530.6526 ns | 6.0316 ns | 25.5897 ns | 1 |

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Benchmarking of using exceptions to control code flow
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, '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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ExceptionsPerformance
Benchmarking of using exceptions to control code flow.
There are two ways to get the value from list of strings (in this solution), one is searching for string using loop and another is using exceptions to tell code that value is not found.
These ways are created to simulate behaviour of ADO .NET DataReader class, where are two ways to get whether data row contains field or not.
They are:
  • GetOrdinal - getting index by field name. Throws exception when field not found.
  • Loop with GetFieldName. No exceptions are thrown.
Start Benchmarker project from your IDE and look at results. These are results from my laptop:
 Method | Mean | StdErr | StdDev | Rank |
--------------------------------- |---------------- |-------------- |--------------- |----- |
WithLoop_100PercentNotFound | 5,301.9258 ns | 53.0328 ns | 339.5758 ns | 4 |
WithLoop_50PercentNotFound | 6,160.5118 ns | 72.6483 ns | 355.9023 ns | 5 |
WithLoop_10PercentNotFound | 4,097.5560 ns | 40.5199 ns | 249.7812 ns | 3 |
WithLoop_AllFound | 3,048.1326 ns | 30.3764 ns | 163.5820 ns | 2 |
WithException_100PercentNotFound | 157,972.4183 ns | 1,694.8235 ns | 11,619.1246 ns | 8 |
WithException_50PercentNotFound | 78,544.0070 ns | 784.2743 ns | 5,319.2074 ns | 7 |
WithException_10PercentNotFound | 15,873.0764 ns | 122.1438 ns | 440.3958 ns | 6 |
WithException_AllFound | 530.6526 ns | 6.0316 ns | 25.5897 ns | 1 |

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Benchmarking of using exceptions to control code flow
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