perf(static): Add preload hint for app.js entrypoint#115800
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Add a <link rel="preload"> for app.js early in the <head> of layout.html so the browser starts fetching it in parallel with the CSS rather than waiting for the parser to reach the <script> tag. Also add a test documenting that content-hashed assets under /_static/dist/ currently receive NO_CACHE headers despite being immutable — a follow-up will address that. Co-Authored-By: Claude <noreply@anthropic.com>
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JonasBa
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May 19, 2026
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| <link rel="preload" href="{% frontend_app_asset_url "sentry" "entrypoints/app.js" %}" as="script" crossorigin="anonymous" /> | ||
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| <link href="{% frontend_app_asset_url "sentry" "entrypoints/sentry.css" %}" rel="stylesheet"/> |
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This line is blocking, the preload can live above
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Start app.js preloading before CSS is fetched and parsed.