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[bug #44555] "make" fails to use parallelism

From: Atte Peltomaki
Subject: [bug #44555] "make" fails to use parallelism
Date: Wed, 12 Aug 2015 04:51:59 +0000
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.130 Safari/537.36

Follow-up Comment #11, bug #44555 (project make):

Following up on Jeff's comment, there are multiple performance regressions
after make 3.81. The fork/vfork is the most significant one, but not the only
one. These perf regressions are serious problems and upgrading from 3.81 would
still cost a small fortune in build farm capacity.

I will attempt to bisect the git tree and find the culprits for rest of the
perf problems, but I encourage also someone more familiar with the code to
take a closer look.


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