<font face="Verdana,Arial,Helvetica,sans-serif" size="2"><div>Hello,</div><div><br></div><div>A colleague of mine who's doing performance testing with some server-side Swift frameworks like Kitura, Perfect and Zewo found a 15-20% degradation with a simple "Hello World" benchmark, with the 3.0.1 previews on Linux. Analysis revealed it is related to the disabling of an optimisation around String comparison for Swift runtimes - this commit - <a href="https://github.com/apple/swift/commit/ef974af339996f63c72d54ec7ef53b625e5a1a76" class="commit-link" target="_blank" style="box-sizing: inherit; cursor: pointer; font-family: arial, helvetica, sans-serif; font-size: 11px;"><font face="arial, helvetica, sans-serif" style="box-sizing: inherit; cursor: pointer; font-family: arial, helvetica, sans-serif; font-size: 11px;"><span style="box-sizing: inherit; cursor: pointer; font-size: 11px;">apple/swift@</span></font><tt style="box-sizing: inherit; cursor: pointer; font-family: arial, helvetica, sans-serif; font-size: 11px;">ef974af</tt></a></div><div><br></div><div>Do we have a plan to reimplement this optimisation for Swift runtimes in the future? Any more information about this would be highly appreciated. <br><font face="Verdana,Arial,Helvetica,sans-serif" size="2"><font><font><div class="socmaildefaultfont" dir="ltr"><div class="socmaildefaultfont" dir="ltr"><div class="socmaildefaultfont" dir="ltr"><div dir="ltr" style="font-style: normal;"><br></div><div dir="ltr" style="font-style: normal;">Thank you!</div><div dir="ltr" style="font-style: normal;"><br><font face="Sans Serif, Verdana, Arial, Helvetica, sans-serif">Pushkar N Kulkarni,</font></div>
<div dir="ltr" style="font-style: normal;"><font face="Sans Serif, Verdana, Arial, Helvetica, sans-serif">IBM Runtimes</font></div><div dir="ltr" style="font-style: normal;"><font face="Sans Serif, Verdana, Arial, Helvetica, sans-serif"><br></font></div><div dir="ltr"><font face="serif, Times New Roman, Times, serif"><i>Simplicity is prerequisite for reliability - Edsger W. Dijkstra</i></font></div>
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