Issue #14489 has been updated by hsbt (Hiroshi SHIBATA).

Assignee set to k0kubun (Takashi Kokubun)

----------------------------------------
Feature #14489: MJIT needs a reusable cache
https://bugs.ruby-lang.org/issues/14489#change-70523

* Author: sam.saffron (Sam Saffron)
* Status: Feedback
* Priority: Normal
* Assignee: k0kubun (Takashi Kokubun)
* Target version: 
----------------------------------------
Currently on Discourse boot I notice a few minutes of jitting every time you boot it:

This is a redacted output: https://gist.github.com/SamSaffron/4e18c2dacf476f1f27275f5b5d7bbb97 

CPU is spinning hard compiling temp file after temp file for **minutes**:

> JIT success (213.1ms): platform_string@/home/sam/.rbenv/versions/master/lib/ruby/gems/2.6.0/gems/bundler-1.16.1/lib/bundler/lazy_specification.rb:18 -> /tmp/_ruby_mjit_p6914u199.c

and so on.

Instead, mjit should have a reusable cache on disk it first tries fetching from prior to re-compiling. It can use an ISEQ SHA1 hash as the key to the cache. 








-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>