fix(utf8): ensure correct validation when legacy mode turned on
This depends on the included update of the prometheus/common dependency.
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Signed-off-by: Owen Williams <owen.williams@grafana.com>
Since `seps` is a variable, `seps[0]` has to be bounds-checked every
time. Replacing with a constant everywhere it is used skips this
overhead.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Use a stack buffer to reduce memory allocations.
`Write(AppendQuote(AvailableBuffer` does not allocate or copy when
the buffer has sufficient space.
Also add a benchmark, with some refactoring.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This reduces bulk and should avoid issues if a fix is made in one file
and not the other.
A few methods now call `Range()` instead of `range`, but nothing
performance-sensitive.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
