(This or something derived from it would be nice for https://github.com/mozilla/rust/issues/7532)
On Sat, Jul 6, 2013 at 11:37 AM, Tommy M. McGuire <[email protected]> wrote: > When I updated my idiotic anagrams-hashmap toy to 0.7, I seem to have > run across a weird performance regression involving hashmaps. > > Previous runs took approximately 6 seconds, but the 0.7 build is 1) > taking about 35 seconds and 2) very variable, since rebuilding it and > sometimes just running it several more times results in smaller run > times of ~22 seconds. Further, inserting some println's to look at what > was taking so long reduced the run time to about 9 seconds. > > It is not limited to that particular program; other versions seem to be > affected as well, including anagrams-hashmap-mmap, which was just > recently run with a post-incoming-change build of the master branch. (5 > seconds vs. 11 seconds.) > > Any ideas what is going on? > > https://github.com/tmmcguire/rust-toys/blob/master/anagrams-hashmap.rs > https://github.com/tmmcguire/rust-toys/blob/master/anagrams-hashmap-mmap.rs > > -- > Tommy M. McGuire > [email protected] > _______________________________________________ > Rust-dev mailing list > [email protected] > https://mail.mozilla.org/listinfo/rust-dev _______________________________________________ Rust-dev mailing list [email protected] https://mail.mozilla.org/listinfo/rust-dev
