<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">I recently noticed a performance problem <br></blockquote><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">...</blockquote><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
What worries me is that such a regression<br>
had been sitting there for over a year<br></blockquote><div><br></div><div><div>There are 215 open <span style="color:rgb(17,85,204);text-decoration:underline"><a href="https://ghc.haskell.org/trac/ghc/query?status=!closed&failure=Runtime+performance+bug&order=id" target="_blank">runtime performance</a></span> tickets (out of a total of 1655 open tickets, that makes 13%).</div></div><div><br></div><div>Compared to say new typesystem features, they don't get much attention. Only a few were <a href="https://ghc.haskell.org/trac/ghc/query?failure=Runtime+performance+bug&resolution=fixed&milestone=8.0.1&milestone=7.10.3&milestone=7.10.2" target="_blank">fixed</a> this year, most of them by Joachim Breitner (the new <a href="https://ghc.haskell.org/trac/ghc/wiki/CodeOwners#CurrentOwners" target="_blank">performance tsar</a>?). He also created <a href="https://perf.haskell.org/ghc/" target="_blank">https://perf.haskell.org/ghc</a>.</div><div><br></div></div><div class="gmail_quote"><div>In case you want to help out, start here: <a href="https://ghc.haskell.org/trac/ghc/wiki/Newcomers" target="_blank">https://ghc.haskell.org/trac/ghc/wiki/Newcomers</a>.</div></div></div></div>