Martin Möhrmann 0dae9dfb08 cmd/compile: improve string iteration performance ... Generate a for loop for ranging over strings that only needs to call the runtime function charntorune for non ASCII characters. This provides faster iteration over ASCII characters and slightly faster iteration for other characters. The runtime function charntorune is changed to take an index from where to start decoding and returns the index after the last byte belonging to the decoded rune. All call sites of charntorune in the runtime are replaced by a for loop that will be transformed by the compiler instead of calling the charntorune function directly. go binary size decreases by 80 bytes. godoc binary size increases by around 4 kilobytes. runtime: name old time/op new time/op delta RuneIterate/range/ASCII-4 43.7ns ± 3% 10.3ns ± 4% -76.33% (p=0.000 n=44+45) RuneIterate/range/Japanese-4 72.5ns ± 2% 62.8ns ± 2% -13.41% (p=0.000 n=49+50) RuneIterate/range1/ASCII-4 43.5ns ± 2% 10.4ns ± 3% -76.18% (p=0.000 n=50+50) RuneIterate/range1/Japanese-4 72.5ns ± 2% 62.9ns ± 2% -13.26% (p=0.000 n=50+49) RuneIterate/range2/ASCII-4 43.5ns ± 3% 10.3ns ± 2% -76.22% (p=0.000 n=48+47) RuneIterate/range2/Japanese-4 72.4ns ± 2% 62.7ns ± 2% -13.47% (p=0.000 n=50+50) strings: name old time/op new time/op delta IndexRune-4 64.7ns ± 5% 22.4ns ± 3% -65.43% (p=0.000 n=25+21) MapNoChanges-4 269ns ± 2% 157ns ± 2% -41.46% (p=0.000 n=23+24) Fields-4 23.0ms ± 2% 19.7ms ± 2% -14.35% (p=0.000 n=25+25) FieldsFunc-4 23.1ms ± 2% 19.6ms ± 2% -14.94% (p=0.000 n=25+24) name old speed new speed delta Fields-4 45.6MB/s ± 2% 53.2MB/s ± 2% +16.87% (p=0.000 n=24+25) FieldsFunc-4 45.5MB/s ± 2% 53.5MB/s ± 2% +17.57% (p=0.000 n=25+24) Updates #13162 Change-Id: I79ffaf828d82bf9887592f08e5cad883e9f39701 Reviewed-on: https://go-review.googlesource.com/27853 TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com> Run-TryBot: Martin Möhrmann <martisch@uos.de>		2016-08-30 18:17:20 +00:00
..
bench	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
bugs	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
chan	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
ddd2.dir	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
dwarf
fixedbugs	cmd/compile: improve string iteration performance	2016-08-30 18:17:20 +00:00
import2.dir	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
import4.dir
interface	cmd/compile: inline x, ok := y.(T) where T is a scalar	2016-08-17 01:12:01 +00:00
intrinsic.dir	cmd/compile: clean up ctz ops	2016-08-23 23:45:12 +00:00
ken	all: fix spelling mistakes	2016-04-03 17:03:15 +00:00
method4.dir
safe
stress	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
syntax	cmd/compile/internal/syntax: match old parser errors and line numbers	2016-08-19 01:10:21 +00:00
uintptrescapes.dir	cmd/compile, syscall: add //go:uintptrescapes comment, and use it	2016-07-06 20:48:41 +00:00
64bit.go
235.go
alg.go	test: add test that required algs get generated	2016-04-24 21:36:52 +00:00
alias1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
alias.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
append.go
args.go
assign1.go
assign.go
atomicload.go	cmd/compile: keep value use counts in SSA	2016-03-17 04:20:02 +00:00
bigalg.go
bigmap.go
blank1.go
blank.go
bom.go
bombad.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
bounds.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
chancap.go
chanlinear.go
char_lit1.go
char_lit.go
checkbce.go	cmd/compile: optimize integer "in range" expressions	2016-08-25 03:49:16 +00:00
clearfat.go
closedchan.go
closure1.go
closure2.go
closure.go
cmp6.go
cmp.go
cmplx.go
cmplxdivide1.go
cmplxdivide.c	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
cmplxdivide.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
complit1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
complit.go
compos.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
const1.go
const2.go
const3.go
const4.go
const5.go
const6.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
const.go
convert1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
convert3.go
convert.go
convlit1.go
convlit.go
convT2X.go
copy.go
crlf.go
ddd1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
ddd2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
ddd.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
decl.go
declbad.go
defer.go
deferfin.go
deferprint.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
deferprint.out
divide.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
divmod.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
empty.go
env.go
eof1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
eof.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
errchk	cmd/vet: make checking example names in _test packages more robust	2016-06-28 22:09:00 +00:00
escape2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape2n.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape3.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape4.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape5.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_array.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_because.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_calls.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_closure.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_field.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_iface.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_indir.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_level.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_map.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_param.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_slice.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_struct_param1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_struct_param2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape_struct_return.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
escape.go
fibo.go
finprofiled.go
float_lit2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
float_lit3.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
float_lit.go
floatcmp.go
for.go
func1.go
func2.go
func3.go
func4.go
func5.go
func6.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
func7.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
func8.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
func.go
funcdup2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
funcdup.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
gc1.go
gc2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
gc.go
gcstring.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
goprint.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
goprint.out
goto.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
heapsampling.go
helloworld.go
helloworld.out
if.go
import1.go
import2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
import4.go
import5.go
import.go
index0.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
index1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
index2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
index.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
indirect1.go
indirect.go
init1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
init.go
initcomma.go
initialize.go
initializerr.go
initloop.go
inline.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
int_lit.go
intcvt.go
intrinsic.go	cmd/compile: added some intrinsics to SSA back end	2016-03-28 16:29:59 +00:00
iota.go
label1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
label.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
linkmain_run.go	test: fix linkmain test	2015-12-17 23:36:13 +00:00
linkmain.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
linkobj.go	cmd/compile: add -linkobj flag to allow writing object file in two parts	2016-05-09 17:31:45 +00:00
linkx_run.go	test: print output on link -X failure	2016-04-20 17:37:35 +00:00
linkx.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
literal.go
live1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
live2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
live_ssa.go	cmd/compile: add MIPS64 optimizations, SSA on by default	2016-08-26 19:45:06 +00:00
live_syscall.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
live.go	cmd/compile: add MIPS64 optimizations, SSA on by default	2016-08-26 19:45:06 +00:00
loopbce.go	cmd/compile: bce when max and limit are consts	2016-04-11 16:01:22 +00:00
mallocfin.go
map1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
map.go
maplinear.go
method1.go	cmd/compile: ignore receiver parameters in Eqtype	2016-03-17 00:38:15 +00:00
method2.go
method3.go
method4.go
method5.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
method.go
named1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
named.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
nil.go
nilcheck.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
nilptr2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
nilptr3_ssa.go	cmd/compile: add MIPS64 optimizations, SSA on by default	2016-08-26 19:45:06 +00:00
nilptr3.go	test: add test for CL 26831	2016-08-17 14:50:34 +00:00
nilptr4.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
nilptr.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
nosplit.go	cmd/compile: ppc64le working, not optimized enough	2016-08-18 16:34:47 +00:00
nul1.go	cmd/compile/internal/syntax: match old parser errors and line numbers	2016-08-19 01:10:21 +00:00
opt_branchlikely.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
parentype.go
peano.go
phiopt.go	cmd/compile: introduce bool operations.	2016-04-25 20:43:04 +00:00
print.go
print.out
printbig.go
printbig.out
prove.go	cmd/compile: transform some Phis into Or8.	2016-04-19 22:04:30 +00:00
range.go
recover1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
recover2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
recover3.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
recover4.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
recover.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
reflectmethod1.go	cmd/compile: track reflect.Type.Method in deadcode	2016-03-11 21:19:20 +00:00
reflectmethod2.go	cmd/compile: track reflect.Type.Method in deadcode	2016-03-11 21:19:20 +00:00
reflectmethod3.go	cmd/compile: track reflect.Type.Method in deadcode	2016-03-11 21:19:20 +00:00
reflectmethod4.go	cmd/link: treat reflect.Value.Method like Call	2016-03-11 22:07:02 +00:00
rename1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
rename.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
reorder2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
reorder.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
return.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
rotate0.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
rotate1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
rotate2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
rotate3.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
rotate.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
run.go	test: remove unused variable	2016-08-16 21:46:54 +00:00
rune.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
runtime.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
shift1.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
shift2.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
sieve.go
sigchld.go
sigchld.out
simassign.go
sinit_run.go
sinit.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
sizeof.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
slice3.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
slice3err.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
slicecap.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
sliceopt.go	cmd/compile: add MIPS64 optimizations, SSA on by default	2016-08-26 19:45:06 +00:00
solitaire.go
stack.go
strength.go	cmd/compile: generalize strength reduction of mulq	2016-03-30 22:27:13 +00:00
string_lit.go
stringrange.go
struct0.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
switch2.go	cmd/compile/internal/syntax: match old parser errors and line numbers	2016-08-19 01:10:21 +00:00
switch3.go
switch4.go
switch5.go	cmd/compile: use a map to track const switch cases	2016-08-23 05:28:33 +00:00
switch6.go	cmd/compile: set correct line number for multiple defaults in switch error	2016-08-22 19:56:06 +00:00
switch.go
tinyfin.go
torture.go
turing.go
typecheck.go
typecheckloop.go
typeswitch1.go
typeswitch2.go
typeswitch3.go
typeswitch.go
uintptrescapes2.go	cmd/compile, syscall: add //go:uintptrescapes comment, and use it	2016-07-06 20:48:41 +00:00
uintptrescapes.go	cmd/compile, syscall: add //go:uintptrescapes comment, and use it	2016-07-06 20:48:41 +00:00
undef.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
utf.go
varerr.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
varinit.go
writebarrier.go	all: make copyright headers consistent with one space after period	2016-05-02 13:43:18 +00:00
zerodivide.go