Share source map with child processes for process isolation#6495
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sebastianbergmann merged 4 commits into11.5from Feb 7, 2026
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## 11.5 #6495 +/- ##
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+ Coverage 95.38% 95.39% +0.01%
- Complexity 7154 7161 +7
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Files 738 738
Lines 21864 21882 +18
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+ Hits 20854 20875 +21
+ Misses 1010 1007 -3 ☔ View full report in Codecov by Sentry. |
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Make the map generated in the parent process using
SourceMapper::map()available in child processes to avoid generating the map using expensive filesystem operations more than once.See #6493 for context and motivation.
Two new static methods are added to
SourceMapperto enable serializing/deserializing the source map:saveTo(string $path, Source $source): boolcomputes the source map viamap(), serializes it, and writes it to a file in the system's temporary directoryloadFrom(string $path, Source $source): voidReads a serialized source map from a file and populates the static$filescache, skipping the expensive filesystem operationsThe new static property
SeparateProcessTestRunner::$sourceMapFileis used to cache the temporary file path across invocations (computed once, reused for all child processes). It is managed through the new private methodsourceMapFileForChildProcess().