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Daniel Martí 75e7e05aee encoding/json: inline fieldByIndex
This function was only used in a single place - in the field encoding
loop within the struct encoder.

Inlining the function call manually lets us get rid of the call
overhead. But most importantly, it lets us simplify the logic afterward.
We no longer need to use reflect.Value{} and !fv.IsValid(), as we can
skip the field immediately.

The two factors combined (mostly just the latter) give a moderate speed
improvement to this hot loop.

name           old time/op    new time/op    delta
CodeEncoder-4    6.01ms ± 1%    5.91ms ± 1%  -1.66%  (p=0.002 n=6+6)

name           old speed      new speed      delta
CodeEncoder-4   323MB/s ± 1%   328MB/s ± 1%  +1.69%  (p=0.002 n=6+6)

Updates #5683.

Change-Id: I12757c325a68abb2856026cf719c122612a1f38e
Reviewed-on: https://go-review.googlesource.com/125417
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-08-22 15:55:40 +00:00
.github .github: use HTTPS for Stack Overflow link in SUPPORT.md 2018-06-12 11:08:14 +00:00
api crypto/tls: make ConnectionState.ExportKeyingMaterial a method 2018-08-22 03:48:56 +00:00
doc crypto/tls: make ConnectionState.ExportKeyingMaterial a method 2018-08-22 03:48:56 +00:00
lib/time lib/time: update vendored tzdata to release 2018e 2018-06-11 14:47:06 +00:00
misc misc/cgo/testcarchive: make the tests work when using gccgo 2018-08-21 15:03:10 +00:00
src encoding/json: inline fieldByIndex 2018-08-22 15:55:40 +00:00
test cmd/compile: implement "OPC $imm, (mem)" for 386 2018-08-22 04:12:42 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: second and final round of updates for Go 1.11 2018-08-12 19:56:28 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: second and final round of updates for Go 1.11 2018-08-12 19:56:28 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
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README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.