upgrading the luajit the CPU increased by 20% ，performance drop
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- C
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Description
client:
ab -n10000000 -c40 -k http://www.hello.com/
server:
openresty-1.13.6.2
LuaJIT-2.1-20180420
some lua scripts
upgrading the luajit version to luajit2-2.1-20220411 , the CPU increased by 20%, QPS and response time did not change（compared to the old luajit version）
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First steps
- Read the whole issue, then the project's contributing guide.
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- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the comparison with the provided ab command against OpenResty 1.13.6.2, LuaJIT-2.1-20180420, and luajit2-2.1-20220411. The issue does not include the Lua scripts or a named code location, so investigate the CPU regression with profiling; done means identifying and addressing the regression while preserving the reported QPS and response time.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, lua
- Domain
- performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100