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Speed up the integration tests - #1411
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Each IT is a Maven run of a few seconds, where C2 compilation and the parallel GC cost more startup time than they save. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The serial Windows profile dates from 2024, with no record of which ITs failed in parallel, and made the Windows jobs with Maven 4 hit the old 30-minute timeout. If an IT breaks here, fix or isolate that IT rather than restoring the profile. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
slachiewicz
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October 10, 2026 08:51
This was referenced Oct 10, 2026
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Each IT is a separate Maven run of a few seconds (278 runs for 249 ITs), so the time goes to JVM startup, and Windows ran them one at a time.
-XX:TieredStopAtLevel=1 -XX:+UseSerialGCthroughJAVA_TOOL_OPTIONS. It is set as an invoker environment variable because 52 ITs set their owninvoker.mavenOpts, which replaces a globalmavenOpts. Both flags exist on JDK 8.windowsprofile that forcedinvoker.parallelThreads=1is removed. It came with Build ITs in parallel #1088 in 2024 without a record of which ITs failed in parallel; none fail in parallel now.<debug>true</debug>stays: turning it off made no measurable difference. Cachingtarget/local-repowould not help either: it is 55 MB, and in CI the first ITs are no slower than the rest.Results on master, the run before this change and the run after it:
Verified:
mvn -P run-its verifyon 69 ITs (Linux, Maven 3.9.16, JDK 21, one thread) → 258 s of IT time before, 176 s after; full suite →Passed: 246, Failed: 0, Errors: 0, Skipped: 1.