event: simplify label slice storage optimization

Now that Builders are on the heap, we can put the static storage
for labels in the Builder, and use it for Event.Labels.

This simplifies dealing with the static label optimization: now there
is only one slice of labels, and its backing array requires no
additional allocation for small sizes.

Change-Id: Ie6badf70b9666aa23d6ab0a287a831d69feb1249
Reviewed-on: https://go-review.googlesource.com/c/exp/+/311457
Trust: Jonathan Amsterdam <jba@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
5 files changed
tree: f8ff04c08a3218699297769da2b1be71f536a1d8
  1. apidiff/
  2. cmd/
  3. ebnf/
  4. ebnflint/
  5. errors/
  6. event/
  7. fsnotify/
  8. inotify/
  9. io/
  10. mmap/
  11. rand/
  12. shiny/
  13. shootout/
  14. sumdb/
  15. utf8string/
  16. winfsnotify/
  17. .gitattributes
  18. .gitignore
  19. AUTHORS
  20. codereview.cfg
  21. CONTRIBUTING.md
  22. CONTRIBUTORS
  23. go.mod
  24. go.sum
  25. LICENSE
  26. PATENTS
  27. README.md
README.md

exp

PkgGoDev

This subrepository holds experimental and deprecated (in the old directory) packages.

The idea for this subrepository originated as the pkg/exp directory of the main repository, but its presence there made it unavailable to users of the binary downloads of the Go installation. The subrepository has therefore been created to make it possible to go get these packages.

Warning: Packages here are experimental and unreliable. Some may one day be promoted to the main repository or other subrepository, or they may be modified arbitrarily or even disappear altogether.

In short, code in this subrepository is not subject to the Go 1 compatibility promise. (No subrepo is, but the promise is even more likely to be violated by go.exp than the others.)

Caveat emptor.