Import source map URLs from Chrome DevTools traces#6190
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fatadel
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Chrome traces recorded with the "disabled-by-default-devtools.v8-source-rundown" category (enabled by default in the DevTools Performance panel) emit a ScriptCatchup event per parsed script that declares the script's source map URL. This way we will be able to apply source maps to them with the "apply sourcemaps" button later on.
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Changes: [Sky Ning] Skip preview links for non-main PRs (#6161) [spokodev] fix(gecko-upgrade): don't crash on a counter with empty sample_groups (#6160) [fatadel] Show counter values over time in profiler-cli (#6136) [Markus Stange] Make profile-conversion snapshots more compact and meaningful (#6152) [Markus Stange] More typed arrays: sample + counter times, some frametable columns (#6139) [Nazım Can Altınova] Only render a marker url field as a link when the whole value is a URL (#6163) [fatadel] Show each counter's owning process in profiler-cli (#6164) [Nazım Can Altınova] Document the pre-existing thread info and network JSON schemas in the cli (#6171) [Markus Stange] Copy column contents in getRawSamplesTableBuilderFromExisting for consistency (#6168) [Markus Stange] Convert eligible columns to typed arrays when outputting from profiler-edit (#6167) [Markus Stange] Remove unused samples.thread column (#6151) [Markus Stange] Fixed botched merge which broke 'yarn ts' (#6174) [Nazım Can Altınova] Add marker handles to `profiler-cli thread network` (#6172) [Markus Stange] Update json-slabs 0.3.0 → 0.4.0 (major) (#6176) [Nazım Can Altınova] Surface network activity across profiler-cli (#6175) [Nazım Can Altınova] Add `profile meta` command to profiler-cli (#6177) [Markus Stange] Allow raw marker table's `startTime` and `endTime` columns to be Float64Array (#6169) [nightcityblade] Fix light theme text selection colors (#6186) [Nazım Can Altınova] Import source map URLs from Chrome DevTools traces (#6190) [Nazım Can Altınova] Rename yarn `build-profiler-cli` script to `build-cli` (#6191) [Nazım Can Altınova] Migrate husky to version 9 (#6201) [Nazım Can Altınova] Fix horizontal overflow when the transform navigator is long (#6199) [fatadel] Add a 'hexadecimal' marker schema field format (#6197) [Nazım Can Altınova] Bump source-map to 0.8.0 and remove the old type workaround (#6202) [Nazım Can Altınova] 🔃 Sync: l10n -> main (July 21, 2026) (#6209) And special thanks to our localizers: fr: parmegiani.thomas fr: Théo Chevalier sr: Марко Костић (Marko Kostić) sv-SE: Luna Jernberg tr: Grk zh-CN: Ariel zh-CN: Olvcpr423
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Fixes #6189.
Chrome traces recorded with the "disabled-by-default-devtools.v8-source-rundown" category (enabled by default in the DevTools Performance panel) emit a
ScriptCatchupevent per parsed script that declares the script's source map URL.This way we will be able to apply source maps to them with the "apply sourcemaps" button later on.
To test it, drag and drop the trace that I linked in the issue. Currently there is no visible changes, but you can look at the profile data from the devtools console. Execute this before and after this fix:
The profile in the issue: Trace-20260715T220108.json.gz