# FYI: status of svn-fe speed 2 messages from 2011-10-26 to 2011-10-26. Participants: David Michael Barr, Tay Ray Chuan. Thread: https://gitlist.dev/t/28773 ## David Michael Barr, 2011-10-26 15:18 Subject: FYI: status of svn-fe speed Message-ID: URL: https://gitlist.dev/e/CAFfmPPNK%2BD%3Dg5h7bdYmON%2B%2BHE5jF_opYxKLobqjOosj--8%2B9FQ%40mail.gmail.com ``` Hi, I talked a lot about low-level speed optimisation after the high-level optimisation is finished this week. I merged my svn-fe-pu branch with jch/next and tested with a 1000 rev dump of patches from git-core. When not blocked, svn-fe can process such revs at ~5000 rev/s on my laptop. This is far above what both svnadmin dump and git fast-import presently achieve and might be deemed excessive. However, this translates to low latency which is critical for parallelisation. I had to use a 10 microsecond sampling interval to get an accurate profile. These numbers have not been normalised but are the complete set of symbols sampled. 2.2% parse_date_basic 1.5% match_string 1.1% svndump_read 1.1% 0x10000af70 [20.2KB] 0.4% strbuf_grow 0.4% strbuf_fread 0.4% strbuf_add 0.4% reset_rev_ctx 0.4% next_quote_pos 0.4% is_date 0.4% fast_export_data 0.4% end_revision 0.4% buffer_read_line 0.4% buffer_copy_bytes I still think it ought to be a little faster. ;) -- David Barr ``` ## Tay Ray Chuan, 2011-10-26 16:18 Subject: Re: FYI: status of svn-fe speed Message-ID: URL: https://gitlist.dev/e/CALUzUxqc2hO-yGte-1EtX1P044moYZPfkCpsKRVBAA7J2Vtn5g%40mail.gmail.com In-Reply-To: ``` On Wed, Oct 26, 2011 at 11:18 PM, David Michael Barr wrote: > I talked a lot about low-level speed optimisation after the high-level > optimisation is finished this week. I merged my svn-fe-pu branch with > jch/next and tested with a 1000 rev dump of patches from git-core. > When not blocked, svn-fe can process such revs at ~5000 rev/s on my I had to rub my eyes when I read this - what??? Good job, then! -- Cheers, Ray Chuan ```