fix: update test.sh for Node 21 and up output
#305
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| grep "busyLoop.*src/busybench.js" | ||
| output=$(pprof -lines -top -nodecount=2 time.pb.gz | tee $tty) | ||
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| # Due to V8 changes in Node 21, the line numbers are different. |
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Thanks for the PR. It's unfortunate that the function name is lost. Do you have any more info on this V8 change or if there is something we can do to workaround it?
It's good to see the output is the same in older node versions.
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Last time I looked at this, I did some playing around and found some weird behavior. #284 somehow restores the function name
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Ah, hm. I am no v8 expert, but from some quick searches, this could be because v8's optimizer was changed/improved in version 11 (which node21 is using). Since busyLoop is in the "hot path", there might be some under the hood optimizations happening to it that hide it from the profiler, which adding noop to break it up removes.
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I'll try to dig for a way to force this, it may even require some changes to how pprof is being called altogether.
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I think I just proved this too, adding this native syntax yields function name in v21 (without the noop function)
function busyLoop(durationSeconds) {
%NeverOptimizeFunction(busyLoop);
You have to execute the benchmark with --allow-natives-syntax, though.
The output:
Showing top 2 nodes out of 6
flat flat% sum% cum cum%
1805ms 68.58% 68.58% 2606ms 99.01% (anonymous) file:/tmp/tmp.YTvrn84YUd/busybench/src/busybench.js:37
634ms 24.09% 92.67% 634ms 24.09% busyLoop file:/tmp/tmp.YTvrn84YUd/busybench/src/busybench.js:32'
interesting that there is still one trace that is anonymous, though,
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@benminer that makes sense and kind of what I figured. Thank you for looking into this. It sounds good to merge this then, I'll let @rohitpruthi-google take it over.
Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## main #305 +/- ##
=======================================
Coverage 41.92% 41.92%
=======================================
Files 14 14
Lines 2092 2092
Branches 42 42
=======================================
Hits 877 877
Misses 1197 1197
Partials 18 18 ☔ View full report in Codecov by Sentry. |
| grep "busyLoop.*src/busybench.ts" | ||
| output=$(pprof -filefunctions -top -nodecount=2 time.pb.gz | tee $tty) | ||
| if [ "$NODE_VERSION" -ge 21 ]; then | ||
| grep "anonymous.*busybench.ts" <<< "$output" |
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The tests are failing for node 21 because of the error:
++ pprof -filefunctions -top -nodecount=2 time.pb.gz
++ tee
Main binary filename not available.
+ output='Type: wall
Time: Feb 18, 2025 at 12:04pm (UTC)
Duration: 10.04s, Total samples = 9.26s (92.25%)
Showing nodes accounting for 8.74s, 94.40% of 9.26s total
Dropped 53 nodes (cum <= 0.05s)
Showing top 2 nodes out of 6
flat flat% sum% cum cum%
7.51s 81.13% 81.13% 7.52s 81.24% (anonymous) /tmp/tmp.wxlgZ4mMRa/busybench/build/src/busybench.js
1.23s 13.28% 94.40% 1.23s 13.28% (idle)'
+ '[' 21 -ge 21 ']'
+ grep 'anonymous.*busybench.ts'
** TEST FAILED **
Could you please change this to busybench.js here? I am assuming the source reported here is from build files, hence the different extension.
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@rohitpruthi-google Not sure how I missed this, but yes, will fix!
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