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Carlo Alberto Ferraris f798dc6825 fmt: recycle printers with large buffers
Previously when a printer had a large buffer we dropped both
the buffer and the printer. There is no need to drop the printer
in this case, as a printer with a nil buffer is valid. So we
just drop the buffer and recycle the printer anyway.
This saves one allocation in case the buffer is over the limit.

Also tighten some of the tests for other unrelated cases.

Change-Id: Iba1b6a71ca4691464b8c68ab0b6ab0d4d5d6168c
Reviewed-on: https://go-review.googlesource.com/c/go/+/427395
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Rob Pike <r@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-09-03 15:45:36 +00:00
.github .github: add quotations around label 2022-09-02 19:40:34 +00:00
api cmd/cgo: add and use runtime/cgo.Incomplete instead of //go:notinheap 2022-08-28 16:04:49 +00:00
doc doc/go1.20: populate initial TODOs via relnote 2022-08-24 18:36:56 +00:00
lib/time lib/time, time/tzdata: update to 2022b 2022-08-11 20:03:19 +00:00
misc runtime: add address sanitizer support for ppc64le 2022-08-26 18:13:33 +00:00
src fmt: recycle printers with large buffers 2022-09-03 15:45:36 +00:00
test runtime: drop function context from traceback 2022-09-02 19:04:48 +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/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
LICENSE
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README.md README.md: update wiki link 2022-04-26 16:21:18 +00:00
SECURITY.md SECURITY.md: replace golang.org with go.dev 2022-04-26 19:59:47 +00:00

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