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Joe Tsai e8cdab5c49 encoding: optimize growth behavior in Encoding.AppendDecode
The Encoding.DecodedLen API only returns the maximum length of the
expected decoded output, since it does not know about padding.
Since we have the input, we can do better by computing the
input length without padding, and then perform the DecodedLen
calculation as if there were no padding.

This avoids over-growing the destination slice if possible.
Over-growth is still possible since the input may contain
ignore characters like newlines and carriage returns,
but those a rarely encountered in practice.

Change-Id: I38b8f91de1f4fbd3a7128c491a25098bd385cf74
Reviewed-on: https://go-review.googlesource.com/c/go/+/520267
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-08-19 22:25:23 +00:00
.github .github: fix templates with multiple labels 2023-07-31 18:28:27 +00:00
api encoding: add AppendEncode and AppendDecode 2023-08-17 16:23:42 +00:00
doc spec: correct type parameter name used in example 2023-08-18 20:44:48 +00:00
lib/time lib/time: update to 2023c/2023c 2023-05-03 20:14:11 +00:00
misc misc/wasm: switch default WASI runtime 2023-07-26 14:30:35 +00:00
src encoding: optimize growth behavior in Encoding.AppendDecode 2023-08-19 22:25:23 +00:00
test cmd/compile: enable -d=zerocopy by default 2023-08-18 11:59:42 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/platform,cmd/dist: export the list of supported platforms 2023-06-22 19:44:52 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00
LICENSE
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README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md SECURITY.md: replace golang.org with go.dev 2022-04-26 19:59:47 +00:00

The Go Programming Language

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