upgrading the luajit the CPU increased by 20% ，performance drop

[fairyqb]

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）