<div dir="ltr">Not sure if your explaination is correct, I think the Apple team explained Speedup <1.0x is slower under Regression and >1.0x is faster under improvement.<div><br></div><div>The table seriously need improvement or everyone will be confused.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Apr 21, 2017 at 12:27 AM, Saagar Jha <span dir="ltr"><<a href="mailto:saagar@saagarjha.com" target="_blank">saagar@saagarjha.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Delta is (OLD_MIN - NEW_MIN) / OLD_MIN expressed as a percent; speedup is (OLD_MIN - NEW_MIN) / NEW_MIN as a decimal. A negative delta corresponds to a speedup less than 1 (i.e the newer one is slower) and a positive delta to a speedup greater than one (i.e. the newer one is faster).<div><br><div>
<div style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word">Saagar Jha</div>
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<br><div><blockquote type="cite"><span class=""><div>On Apr 20, 2017, at 07:48, Proyb P via swift-users <<a href="mailto:swift-users@swift.org" target="_blank">swift-users@swift.org</a>> wrote:</div><br class="m_4046115304136940063Apple-interchange-newline"></span><div><span class=""><div dir="ltr">What those PR in Swift CI benchmark shown "Regression", "Old_min", "new_min", "delta" and "speedup" really mean? Speedup can be confusing when Delta is either a positive or negative value.<div><div><br></div><div><a href="https://github.com/apple/swift/pull/3796" target="_blank">https://github.com/apple/<wbr>swift/pull/3796</a></div></div><div><br></div><div><br></div><div><br></div><div><br></div></div></span>
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