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On Tue, Jan 29, 2013 at 3:59 PM, Murali, Sriram <sriram.murali at intel.com> wrote: > Our benchmark results show that the compilation time performance improved by > ~0.5%. That's fairly small; what was the standard deviation, confidence interval, etc? -- Sean Silva

...470.lbm 100.00 100.07 471.omnetpp 100.00 100.36 bitmnp01 100.00 100.44 cjpegv2data6 100.00 100.76 idctrn01 100.00 99.83 libquake2 100.00 100.08 libquake_portable 100.00 100.02 libxcsoar 100.00 100.08 linpack 100.00 101.07 matrix01 100.00 100.28 nbench 100.00 100.76 tblook01 100.00 101.52 ttsprk01 100.00 100.82 Geomean 100.00 100.51 -----Original Message----- From: Sean Silva [mailto:silvas at purdue.edu] Sent: Tuesday, January 29, 2013 6:41 PM To: Murali, Sriram Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] [Patch][Review Requested][Compilation Time]...

Hello, This patch aims to improve compile time performance by increasing the SCEV vector size in LoopStrengthReduce. It is observed that the BaseRegs vector size is 4 in most cases, and elements are frequently copied when it is initialized as SmallVector<const SCEV *, 2> BaseRegs. Our benchmark results show that the compilation time performance improved by ~0.5%. Patch by Wan Xiaofei.