build upload: stream normalization + ZIP emission instead of buffering artifacts in memory #1497

Closed
#1498
Closed
build upload: stream normalization + ZIP emission instead of buffering artifacts in memory#1497
#1498

Description

@jared-outpost
jared-outpost
bot
opened on Aug 27, 2026

Background

sentry build upload normalizes every mobile build artifact fully in memory before assembling the deterministic upload wrapper:

  • normalizeIpa reads the entire IPA and re-emits it via a single zipSync.
  • normalizeBuildDirectory reads the whole XCArchive tree into memory.
  • collectDsymEntries extracts dSYM ZIPs to a temp dir but then reads the bytes back in, and the final zipSync assembles the wrapper as one buffer.

For large inputs (big XCArchives, large dSYM bundles) this holds the artifact plus the wrapper in memory at once, bounded only by Node's ~2 GiB buffer limit. This surfaced during review of #1467 (dSYM support), but it is not specific to dSYMs — it is the shared normalization path.

Proposed work

Convert the shared normalization + ZIP-emission path to stream for all build types:

  • Stage entries via temp files on disk instead of buffering.
  • Use a chunked/streaming ZIP writer instead of a single zipSync over an in-memory map.
  • Preserve the current deterministic wrapper output (STORE compression, fixed mtime, sorted entries) so chunk dedup across re-uploads is unaffected.

Scope notes

  • Cross-cutting change to packages/cli/src/lib/build/index.ts; touches IPA, XCArchive, APK/AAB, and dSYM paths.
  • Must keep byte-for-byte wrapper determinism (verified by the existing normalization tests).

Follow-up from #1467 (per review discussion).

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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" + '

      Skip to content
      build upload: stream normalization + ZIP emission instead of buffering artifacts in memory #1497
      Closed
      #1498
      Closed
      build upload: stream normalization + ZIP emission instead of buffering artifacts in memory#1497
      #1498
      Description
      @jared-outpost
      jared-outpost
      bot
      opened on Aug 27, 2026
      Background
      sentry build upload normalizes every mobile build artifact fully in memory before assembling the deterministic upload wrapper:
      • normalizeIpa reads the entire IPA and re-emits it via a single zipSync.
      • normalizeBuildDirectory reads the whole XCArchive tree into memory.
      • collectDsymEntries extracts dSYM ZIPs to a temp dir but then reads the bytes back in, and the final zipSync assembles the wrapper as one buffer.
      For large inputs (big XCArchives, large dSYM bundles) this holds the artifact plus the wrapper in memory at once, bounded only by Node's ~2 GiB buffer limit. This surfaced during review of #1467 (dSYM support), but it is not specific to dSYMs — it is the shared normalization path.
      Proposed work
      Convert the shared normalization + ZIP-emission path to stream for all build types:
      • Stage entries via temp files on disk instead of buffering.
      • Use a chunked/streaming ZIP writer instead of a single zipSync over an in-memory map.
      • Preserve the current deterministic wrapper output (STORE compression, fixed mtime, sorted entries) so chunk dedup across re-uploads is unaffected.
      Scope notes
      • Cross-cutting change to packages/cli/src/lib/build/index.ts; touches IPA, XCArchive, APK/AAB, and dSYM paths.
      • Must keep byte-for-byte wrapper determinism (verified by the existing normalization tests).
      Follow-up from #1467 (per review discussion).
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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('^' + ".*" + '

          Skip to content
          build upload: stream normalization + ZIP emission instead of buffering artifacts in memory #1497
          Closed
          #1498
          Closed
          build upload: stream normalization + ZIP emission instead of buffering artifacts in memory#1497
          #1498
          Description
          @jared-outpost
          jared-outpost
          bot
          opened on Aug 27, 2026
          Background
          sentry build upload normalizes every mobile build artifact fully in memory before assembling the deterministic upload wrapper:
          • normalizeIpa reads the entire IPA and re-emits it via a single zipSync.
          • normalizeBuildDirectory reads the whole XCArchive tree into memory.
          • collectDsymEntries extracts dSYM ZIPs to a temp dir but then reads the bytes back in, and the final zipSync assembles the wrapper as one buffer.
          For large inputs (big XCArchives, large dSYM bundles) this holds the artifact plus the wrapper in memory at once, bounded only by Node's ~2 GiB buffer limit. This surfaced during review of #1467 (dSYM support), but it is not specific to dSYMs — it is the shared normalization path.
          Proposed work
          Convert the shared normalization + ZIP-emission path to stream for all build types:
          • Stage entries via temp files on disk instead of buffering.
          • Use a chunked/streaming ZIP writer instead of a single zipSync over an in-memory map.
          • Preserve the current deterministic wrapper output (STORE compression, fixed mtime, sorted entries) so chunk dedup across re-uploads is unaffected.
          Scope notes
          • Cross-cutting change to packages/cli/src/lib/build/index.ts; touches IPA, XCArchive, APK/AAB, and dSYM paths.
          • Must keep byte-for-byte wrapper determinism (verified by the existing normalization tests).
          Follow-up from #1467 (per review discussion).
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            No labels
            No labels
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, '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
              build upload: stream normalization + ZIP emission instead of buffering artifacts in memory #1497
              Closed
              #1498
              Closed
              build upload: stream normalization + ZIP emission instead of buffering artifacts in memory#1497
              #1498
              Description
              @jared-outpost
              jared-outpost
              bot
              opened on Aug 27, 2026
              Background
              sentry build upload normalizes every mobile build artifact fully in memory before assembling the deterministic upload wrapper:
              • normalizeIpa reads the entire IPA and re-emits it via a single zipSync.
              • normalizeBuildDirectory reads the whole XCArchive tree into memory.
              • collectDsymEntries extracts dSYM ZIPs to a temp dir but then reads the bytes back in, and the final zipSync assembles the wrapper as one buffer.
              For large inputs (big XCArchives, large dSYM bundles) this holds the artifact plus the wrapper in memory at once, bounded only by Node's ~2 GiB buffer limit. This surfaced during review of #1467 (dSYM support), but it is not specific to dSYMs — it is the shared normalization path.
              Proposed work
              Convert the shared normalization + ZIP-emission path to stream for all build types:
              • Stage entries via temp files on disk instead of buffering.
              • Use a chunked/streaming ZIP writer instead of a single zipSync over an in-memory map.
              • Preserve the current deterministic wrapper output (STORE compression, fixed mtime, sorted entries) so chunk dedup across re-uploads is unaffected.
              Scope notes
              • Cross-cutting change to packages/cli/src/lib/build/index.ts; touches IPA, XCArchive, APK/AAB, and dSYM paths.
              • Must keep byte-for-byte wrapper determinism (verified by the existing normalization tests).
              Follow-up from #1467 (per review discussion).
              Metadata
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              Assignees
              No one assigned
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                No labels
                No labels
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                No projects
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                  No milestone
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                  None yet
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                  No branches or pull requests
                  Issue actions
                  
, '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
                  build upload: stream normalization + ZIP emission instead of buffering artifacts in memory #1497
                  Closed
                  #1498
                  Closed
                  build upload: stream normalization + ZIP emission instead of buffering artifacts in memory#1497
                  #1498
                  Description
                  @jared-outpost
                  jared-outpost
                  bot
                  opened on Aug 27, 2026
                  Background
                  sentry build upload normalizes every mobile build artifact fully in memory before assembling the deterministic upload wrapper:
                  • normalizeIpa reads the entire IPA and re-emits it via a single zipSync.
                  • normalizeBuildDirectory reads the whole XCArchive tree into memory.
                  • collectDsymEntries extracts dSYM ZIPs to a temp dir but then reads the bytes back in, and the final zipSync assembles the wrapper as one buffer.
                  For large inputs (big XCArchives, large dSYM bundles) this holds the artifact plus the wrapper in memory at once, bounded only by Node's ~2 GiB buffer limit. This surfaced during review of #1467 (dSYM support), but it is not specific to dSYMs — it is the shared normalization path.
                  Proposed work
                  Convert the shared normalization + ZIP-emission path to stream for all build types:
                  • Stage entries via temp files on disk instead of buffering.
                  • Use a chunked/streaming ZIP writer instead of a single zipSync over an in-memory map.
                  • Preserve the current deterministic wrapper output (STORE compression, fixed mtime, sorted entries) so chunk dedup across re-uploads is unaffected.
                  Scope notes
                  • Cross-cutting change to packages/cli/src/lib/build/index.ts; touches IPA, XCArchive, APK/AAB, and dSYM paths.
                  • Must keep byte-for-byte wrapper determinism (verified by the existing normalization tests).
                  Follow-up from #1467 (per review discussion).
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    No labels
                    No labels
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, '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
                      build upload: stream normalization + ZIP emission instead of buffering artifacts in memory #1497
                      Closed
                      #1498
                      Closed
                      build upload: stream normalization + ZIP emission instead of buffering artifacts in memory#1497
                      #1498
                      Description
                      @jared-outpost
                      jared-outpost
                      bot
                      opened on Aug 27, 2026
                      Background
                      sentry build upload normalizes every mobile build artifact fully in memory before assembling the deterministic upload wrapper:
                      • normalizeIpa reads the entire IPA and re-emits it via a single zipSync.
                      • normalizeBuildDirectory reads the whole XCArchive tree into memory.
                      • collectDsymEntries extracts dSYM ZIPs to a temp dir but then reads the bytes back in, and the final zipSync assembles the wrapper as one buffer.
                      For large inputs (big XCArchives, large dSYM bundles) this holds the artifact plus the wrapper in memory at once, bounded only by Node's ~2 GiB buffer limit. This surfaced during review of #1467 (dSYM support), but it is not specific to dSYMs — it is the shared normalization path.
                      Proposed work
                      Convert the shared normalization + ZIP-emission path to stream for all build types:
                      • Stage entries via temp files on disk instead of buffering.
                      • Use a chunked/streaming ZIP writer instead of a single zipSync over an in-memory map.
                      • Preserve the current deterministic wrapper output (STORE compression, fixed mtime, sorted entries) so chunk dedup across re-uploads is unaffected.
                      Scope notes
                      • Cross-cutting change to packages/cli/src/lib/build/index.ts; touches IPA, XCArchive, APK/AAB, and dSYM paths.
                      • Must keep byte-for-byte wrapper determinism (verified by the existing normalization tests).
                      Follow-up from #1467 (per review discussion).
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        No labels
                        No labels
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, '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
                          build upload: stream normalization + ZIP emission instead of buffering artifacts in memory #1497
                          Closed
                          #1498
                          Closed
                          build upload: stream normalization + ZIP emission instead of buffering artifacts in memory#1497
                          #1498
                          Description
                          @jared-outpost
                          jared-outpost
                          bot
                          opened on Aug 27, 2026
                          Background
                          sentry build upload normalizes every mobile build artifact fully in memory before assembling the deterministic upload wrapper:
                          • normalizeIpa reads the entire IPA and re-emits it via a single zipSync.
                          • normalizeBuildDirectory reads the whole XCArchive tree into memory.
                          • collectDsymEntries extracts dSYM ZIPs to a temp dir but then reads the bytes back in, and the final zipSync assembles the wrapper as one buffer.
                          For large inputs (big XCArchives, large dSYM bundles) this holds the artifact plus the wrapper in memory at once, bounded only by Node's ~2 GiB buffer limit. This surfaced during review of #1467 (dSYM support), but it is not specific to dSYMs — it is the shared normalization path.
                          Proposed work
                          Convert the shared normalization + ZIP-emission path to stream for all build types:
                          • Stage entries via temp files on disk instead of buffering.
                          • Use a chunked/streaming ZIP writer instead of a single zipSync over an in-memory map.
                          • Preserve the current deterministic wrapper output (STORE compression, fixed mtime, sorted entries) so chunk dedup across re-uploads is unaffected.
                          Scope notes
                          • Cross-cutting change to packages/cli/src/lib/build/index.ts; touches IPA, XCArchive, APK/AAB, and dSYM paths.
                          • Must keep byte-for-byte wrapper determinism (verified by the existing normalization tests).
                          Follow-up from #1467 (per review discussion).
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            No labels
                            No labels
                            Projects
                            No projects
                              Milestone
                              No milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, '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); }
})();
})();

                              Skip to content
                              build upload: stream normalization + ZIP emission instead of buffering artifacts in memory #1497
                              Closed
                              #1498
                              Closed
                              build upload: stream normalization + ZIP emission instead of buffering artifacts in memory#1497
                              #1498
                              Description
                              @jared-outpost
                              jared-outpost
                              bot
                              opened on Aug 27, 2026
                              Background
                              sentry build upload normalizes every mobile build artifact fully in memory before assembling the deterministic upload wrapper:
                              • normalizeIpa reads the entire IPA and re-emits it via a single zipSync.
                              • normalizeBuildDirectory reads the whole XCArchive tree into memory.
                              • collectDsymEntries extracts dSYM ZIPs to a temp dir but then reads the bytes back in, and the final zipSync assembles the wrapper as one buffer.
                              For large inputs (big XCArchives, large dSYM bundles) this holds the artifact plus the wrapper in memory at once, bounded only by Node's ~2 GiB buffer limit. This surfaced during review of #1467 (dSYM support), but it is not specific to dSYMs — it is the shared normalization path.
                              Proposed work
                              Convert the shared normalization + ZIP-emission path to stream for all build types:
                              • Stage entries via temp files on disk instead of buffering.
                              • Use a chunked/streaming ZIP writer instead of a single zipSync over an in-memory map.
                              • Preserve the current deterministic wrapper output (STORE compression, fixed mtime, sorted entries) so chunk dedup across re-uploads is unaffected.
                              Scope notes
                              • Cross-cutting change to packages/cli/src/lib/build/index.ts; touches IPA, XCArchive, APK/AAB, and dSYM paths.
                              • Must keep byte-for-byte wrapper determinism (verified by the existing normalization tests).
                              Follow-up from #1467 (per review discussion).
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                No labels
                                No labels
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions