Commit Graph

1 Commits

Author SHA1 Message Date
Roman Khavronenko
fae589bb83
lib/promrelabel: speedup label match by __name__ ()
The change adds a fastpath for `equalValue` comparisons against
`__name__` label by avoiding calls to `toCanonicalLabelName` func. This
speedups matches by metric name like `'foo'`. See bench stats below:
```
benchcmp old.txt new.txt

benchmark                                           old ns/op     new ns/op     delta
BenchmarkIfExpression/equal_label:_last-10          35.6          35.1          -1.18%
BenchmarkIfExpression/equal_label:_middle-10        18.3          17.3          -5.41%
BenchmarkIfExpression/equal_label:_first-10         1.20          1.24          +2.74%
BenchmarkIfExpression/equal___name__:_last-10       10.1          4.96          -50.75%
BenchmarkIfExpression/equal___name__:_middle-10     5.79          3.16          -45.41%
BenchmarkIfExpression/equal___name__:_first-10      1.17          1.05          -9.76%
```

Signed-off-by: hagen1778 <roman@victoriametrics.com>
2024-06-07 16:35:52 +02:00