Avoid the decimal lookup in digits array and compute the decimal character value directly.
Reduce calls to 64bit division on 32bit plattforms by splitting conversion into smaller blocks.
Convert value to uintptr type when it can be represented by uintptr.
on darwin/386
benchmark old ns/op new ns/op delta
BenchmarkFormatInt 8352 7466 -10.61%
BenchmarkAppendInt 4281 3401 -20.56%
BenchmarkFormatUint 2785 2251 -19.17%
BenchmarkAppendUint 1770 1223 -30.90%
on darwin/amd64
benchmark old ns/op new ns/op delta
BenchmarkFormatInt 5531 5492 -0.71%
BenchmarkAppendInt 2435 2295 -5.75%
BenchmarkFormatUint 1628 1569 -3.62%
BenchmarkAppendUint 726 750 +3.31%
Change-Id: Ifca281cbdd62ab7d7bd4b077a96da99eb12cf209
Reviewed-on: https://go-review.googlesource.com/2105
Reviewed-by: Robert Griesemer <gri@golang.org>
The new test case produces the longest string representation possible and thereby uses
all of the 65 bytes in the buffer array used by the formatBits function.
Change-Id: I11320c4de56ced5ff098b7e37f1be08e456573e2
Reviewed-on: https://go-review.googlesource.com/2108
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
