delta/go-git.git/src/encoding/gob/encgen.go, branch dev.inline github.com: golang/go encoding/gob: custom array/slice decoders 2014-10-17T19:37:41+00:00 Rob Pike r@golang.org 2014-10-17T19:37:41+00:00 9965e4022030f56fc241be8934d5e6b95ac84900 Use go generate to write better loops for decoding arrays, just as we did for encoding. It doesn't help as much, relatively speaking, but it's still noticeable. benchmark old ns/op new ns/op delta BenchmarkDecodeComplex128Slice 202348 184529 -8.81% BenchmarkDecodeFloat64Slice 135800 120979 -10.91% BenchmarkDecodeInt32Slice 121200 105149 -13.24% BenchmarkDecodeStringSlice 288129 278214 -3.44% LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/154420044 
Use go generate to write better loops for decoding arrays,
just as we did for encoding. It doesn't help as much,
relatively speaking, but it's still noticeable.

benchmark                          old ns/op     new ns/op     delta
BenchmarkDecodeComplex128Slice     202348        184529        -8.81%
BenchmarkDecodeFloat64Slice        135800        120979        -10.91%
BenchmarkDecodeInt32Slice          121200        105149        -13.24%
BenchmarkDecodeStringSlice         288129        278214        -3.44%

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/154420044
encoding/gob: speed up encoding of arrays and slices 2014-10-17T16:00:07+00:00 Rob Pike r@golang.org 2014-10-17T16:00:07+00:00 5e713062b42110b9f7ccd1c326fab0e42b5b8c35 We borrow a trick from the fmt package and avoid reflection to walk the elements when possible. We could push further with unsafe (and we may) but this is a good start. Decode can benefit similarly; it will be done separately. Use go generate (engen.go) to produce the helper functions (enc_helpers.go). benchmark old ns/op new ns/op delta BenchmarkEndToEndPipe 6593 6482 -1.68% BenchmarkEndToEndByteBuffer 3662 3684 +0.60% BenchmarkEndToEndSliceByteBuffer 350306 351693 +0.40% BenchmarkComplex128Slice 96347 80045 -16.92% BenchmarkInt32Slice 42484 26008 -38.78% BenchmarkFloat64Slice 51143 36265 -29.09% BenchmarkStringSlice 53402 35077 -34.32% LGTM=rsc R=rsc CC=golang-codereviews https://golang.org/cl/156310043 
We borrow a trick from the fmt package and avoid reflection
to walk the elements when possible. We could push further with
unsafe (and we may) but this is a good start.
Decode can benefit similarly; it will be done separately.

Use go generate (engen.go) to produce the helper functions
(enc_helpers.go).

benchmark                            old ns/op     new ns/op     delta
BenchmarkEndToEndPipe                6593          6482          -1.68%
BenchmarkEndToEndByteBuffer          3662          3684          +0.60%
BenchmarkEndToEndSliceByteBuffer     350306        351693        +0.40%
BenchmarkComplex128Slice             96347         80045         -16.92%
BenchmarkInt32Slice                  42484         26008         -38.78%
BenchmarkFloat64Slice                51143         36265         -29.09%
BenchmarkStringSlice                 53402         35077         -34.32%

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/156310043