comm: hold the stdin lock for the whole duration of the program #9085
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Being a single-threaded program, there's no benefit in having comm obtain a lock every time it needs to read a line. This commit removes the unnecessary overhead by obtaining a lock at the start of the program and keeping it for the whole duration of the program.
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GNU testsuite comparison: |
CodSpeed Performance ReportMerging #9085 will degrade performances by 3.86%Comparing Summary
Benchmarks breakdown
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Being a single-threaded program, there's no benefit in having comm obtain a lock every time it needs to read a line. This commit removes the unnecessary overhead by obtaining a lock at the start of the program and keeping it for the whole duration of the program.