Eitan Adler
789c5255a4
all: remove the the duplicate words
...
Change-Id: I6343c162e27e2e492547c96f1fc504909b1c03c0
Reviewed-on: https://go-review.googlesource.com/37793
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-03-06 04:39:12 +00:00
Keith Randall
dd24b1098a
cmd/compile: improve tighten pass
...
Move a value to the block which is the lowest common ancestor in the
dominator tree of all of its uses. Make sure not to move a value into a
loop.
Makes the tighten pass on average (across go1 benchmarks) 40% slower.
Still not a big contributor to overall compile time.
Binary size is just a tad smaller.
name old time/op new time/op delta
BinaryTree17-12 2.77s ± 9% 2.76s ± 9% ~ (p=0.878 n=8+8)
Fannkuch11-12 2.75s ± 1% 2.74s ± 1% ~ (p=0.232 n=8+7)
FmtFprintfEmpty-12 48.9ns ± 9% 47.7ns ± 0% ~ (p=0.431 n=8+8)
FmtFprintfString-12 143ns ± 8% 142ns ± 1% ~ (p=0.257 n=8+7)
FmtFprintfInt-12 123ns ± 1% 122ns ± 1% -1.04% (p=0.026 n=7+8)
FmtFprintfIntInt-12 195ns ± 7% 185ns ± 0% -5.32% (p=0.000 n=8+8)
FmtFprintfPrefixedInt-12 194ns ± 4% 195ns ± 0% +0.81% (p=0.015 n=7+7)
FmtFprintfFloat-12 267ns ± 0% 268ns ± 0% +0.37% (p=0.001 n=7+6)
FmtManyArgs-12 800ns ± 0% 762ns ± 1% -4.78% (p=0.000 n=8+8)
GobDecode-12 7.67ms ± 2% 7.60ms ± 2% ~ (p=0.234 n=8+8)
GobEncode-12 6.55ms ± 0% 6.57ms ± 1% ~ (p=0.336 n=7+8)
Gzip-12 237ms ± 0% 238ms ± 0% +0.40% (p=0.017 n=7+7)
Gunzip-12 40.8ms ± 0% 40.2ms ± 0% -1.52% (p=0.000 n=7+8)
HTTPClientServer-12 208µs ± 3% 209µs ± 3% ~ (p=0.955 n=8+7)
JSONEncode-12 16.2ms ± 1% 17.2ms ±11% +5.80% (p=0.001 n=7+8)
JSONDecode-12 57.3ms ±12% 55.5ms ± 3% ~ (p=0.867 n=8+7)
Mandelbrot200-12 4.68ms ± 6% 4.46ms ± 1% ~ (p=0.442 n=8+8)
GoParse-12 4.27ms ±44% 3.42ms ± 1% -19.95% (p=0.005 n=8+8)
RegexpMatchEasy0_32-12 75.1ns ± 0% 75.8ns ± 1% +0.99% (p=0.002 n=7+7)
RegexpMatchEasy0_1K-12 963ns ± 0% 1021ns ± 6% +5.98% (p=0.001 n=7+7)
RegexpMatchEasy1_32-12 72.4ns ±11% 70.8ns ± 1% ~ (p=0.368 n=8+8)
RegexpMatchEasy1_1K-12 394ns ± 1% 399ns ± 0% +1.23% (p=0.000 n=8+7)
RegexpMatchMedium_32-12 114ns ± 0% 115ns ± 1% +0.63% (p=0.021 n=7+7)
RegexpMatchMedium_1K-12 35.9µs ± 0% 37.6µs ± 1% +4.72% (p=0.000 n=7+8)
RegexpMatchHard_32-12 1.93µs ± 2% 1.91µs ± 0% -0.91% (p=0.001 n=7+7)
RegexpMatchHard_1K-12 60.2µs ± 3% 61.2µs ±10% ~ (p=0.442 n=8+8)
Revcomp-12 404ms ± 1% 406ms ± 1% ~ (p=0.054 n=8+7)
Template-12 64.6ms ± 1% 63.5ms ± 1% -1.66% (p=0.000 n=8+8)
TimeParse-12 347ns ± 8% 309ns ± 0% -11.13% (p=0.000 n=8+7)
TimeFormat-12 343ns ± 4% 331ns ± 0% -3.34% (p=0.000 n=8+7)
Change-Id: Id6da1239ddd4d0cb074ff29cffb06302d1c6d08f
Reviewed-on: https://go-review.googlesource.com/28712
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2016-09-20 22:49:48 +00:00
Todd Neal
adc8d491c2
[dev.ssa] cmd/compiler: rewrite AND x const as a shift if possible
...
ANDs of constants whose only set bits are leading or trailing can be
rewritten as two shifts instead. This is slightly faster for 32 or
64 bit operands.
Change-Id: Id5c1ff27e5a4df22fac67b03b9bddb944871145d
Reviewed-on: https://go-review.googlesource.com/19485
Run-TryBot: Todd Neal <todd@tneal.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2016-02-16 16:53:16 +00:00
