Fold testcase_run.sh logic into judgedaemon.
#3286
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No need to review yet, I am still testing and there are some follow-up changes required. |
meisterT
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The primary motivation is to significantly reduce the per-testcase overhead of judging a submission. Historically, with fewer test cases, the separation was carrying its weight. However, with modern problems requiring many test cases or passes, the overhead from dozens of forked simple programs (`cp`, `mv`, `chmod`, `grep` etc.) within the shell script has become a major performance bottleneck. Moving them into PHP effectively replaces them with simple system calls. This change results in a substantial performance improvement: * Roughly a 50% speed-up in total judging overhead per submission * Example: A simple C++ solution to a multi-pass problem (NWERC 2025 practice) was reduced from ~70s to ~33s end-to-end.
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The primary motivation is to significantly reduce the per-testcase overhead of judging a submission.
Historically, with fewer test cases, the separation was carrying its weight. However, with modern problems using many test cases or multiple passes, the overhead from dozens of forked simple programs (
cp,mv,chmod,grepetc.) within the shell script has become a major performance bottleneck. Moving them into PHP effectively replaces them with simple system calls.This change results in a substantial performance improvement: