From: abhsha20@... Date: 2020-06-14T05:45:19+00:00 Subject: [ruby-core:98795] [Ruby master Bug#16941] MJIT doesn't identify Struct kind of instruction Issue #16941 has been updated by abhsha (Abhishek Sharma). Hi k0kubun, I think it should be Ok for me with --jit-min-calls=10000. Also, I will take the struct declaration outside of the block, so it shouldn't be a problem anymore for my case. Thanks for all the help. With this ticket I developed an interest in Ruby internals and moving forward, I would like to contribute to the community. I have written a separate email to you to further our discussion as it is beyond the scope of this ticket. :) Thanks, Abhishek ---------------------------------------- Bug #16941: MJIT doesn't identify Struct kind of instruction https://bugs.ruby-lang.org/issues/16941#change-86156 * Author: abhsha (Abhishek Sharma) * Status: Feedback * Priority: Normal * Assignee: k0kubun (Takashi Kokubun) * ruby -v: 2.6.0p0 (2018-12-25 revision 66547) [x86_64-linux] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN ---------------------------------------- MJIT does not identify Struct instructions and gives a warning while compiling to C. Example: def my_method 1.times do a_struct = Struct.new(:a).new a_struct.a = "a" end end my_method $: ruby --jit-save-temps --jit-min-calls=1 --disable-gems --jit --jit-verbose=2 --jit-wait test.rb output: start compilation: a=@test.rb:3 -> /tmp/_ruby_mjit_p30696u2.c MJIT warning: Skipped to compile unsupported instruction: opt_call_c_function JIT failure (0.0ms): a=@test.rb:3 -> /tmp/_ruby_mjit_p30696u2.c Are structs not recognised by JIT compiler? We have this call in our programs many number of times (~ 10^6), it attempts every time and fails. Can this be a cause of programs to get slower with --jit enabled ? -- https://bugs.ruby-lang.org/ Unsubscribe: