From: David Kastrup Date: Thu, 15 Jan 2015 11:53:38 GMT Subject: Re: git-svn metadata commands performance issue Message-ID: <87sifcdzul.fsf@fencepost.gnu.org> In-Reply-To: <20150114203012.GA26023@dcvr.yhbt.net> Eric Wong writes: > How big is the parent process which forks the git commands? On Linux at > least, fork() performance is negatively impacted by parent process > memory size. Huh. I thought with the advent of demand-paging, at the very least with copy-on-write, this was supposed to be sort of a non-issue. The old original UNIX version, in contrast, consisted of swapping out the current process without removing the in-memory copy. But since the in-memory copy then did the exec call and since usually the exec call was happy about every page of free memory (we _are_ talking about something like 64kB of total available memory here), that tended to work reasonably well. -- David Kastrup