perf(logql): Micro-optimizations for IP filter #14072
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Preallocate map to save 2 allocations.
```
goos: darwin
goarch: arm64
pkg: github.com/grafana/loki/v3/pkg/logql/log
cpu: Apple M2 Pro
│ old.txt │ new.txt │
│ sec/op │ sec/op vs base │
_IPFilter/127.0.0.1-10 5.048µ ± 0% 4.591µ ± 1% -9.06% (p=0.002 n=6)
_IPFilter/192.168.0.1-192.189.10.12-10 5.082µ ± 0% 4.634µ ± 0% -8.83% (p=0.002 n=6)
_IPFilter/192.168.4.5/16-10 4.842µ ± 0% 4.390µ ± 0% -9.35% (p=0.002 n=6)
geomean 4.990µ 4.537µ -9.08%
│ old.txt │ new.txt │
│ B/op │ B/op vs base │
_IPFilter/127.0.0.1-10 424.0 ± 0% 341.0 ± 0% -19.58% (p=0.002 n=6)
_IPFilter/192.168.0.1-192.189.10.12-10 424.5 ± 0% 341.0 ± 0% -19.67% (p=0.002 n=6)
_IPFilter/192.168.4.5/16-10 425.0 ± 0% 341.0 ± 0% -19.76% (p=0.002 n=6)
geomean 424.5 341.0 -19.67%
│ old.txt │ new.txt │
│ allocs/op │ allocs/op vs base │
_IPFilter/127.0.0.1-10 10.000 ± 0% 8.000 ± 0% -20.00% (p=0.002 n=6)
_IPFilter/192.168.0.1-192.189.10.12-10 10.000 ± 0% 8.000 ± 0% -20.00% (p=0.002 n=6)
_IPFilter/192.168.4.5/16-10 10.000 ± 0% 8.000 ± 0% -20.00% (p=0.002 n=6)
geomean 10.00 8.000 -20.00%
```
Micro-optimization to use a struct instead of bool to save some bytes.
```
goos: darwin
goarch: arm64
pkg: github.com/grafana/loki/v3/pkg/logql/log
cpu: Apple M2 Pro
│ old.txt │ new.txt │
│ sec/op │ sec/op vs base │
_IPFilter/127.0.0.1-10 4.595µ ± 1% 4.753µ ± 2% +3.44% (p=0.002 n=6)
_IPFilter/192.168.0.1-192.189.10.12-10 4.611µ ± 1% 4.608µ ± 1% ~ (p=0.784 n=6)
_IPFilter/192.168.4.5/16-10 4.374µ ± 0% 4.339µ ± 0% -0.81% (p=0.002 n=6)
geomean 4.525µ 4.563µ +0.84%
│ old.txt │ new.txt │
│ B/op │ B/op vs base │
_IPFilter/127.0.0.1-10 341.0 ± 0% 272.0 ± 0% -20.23% (p=0.002 n=6)
_IPFilter/192.168.0.1-192.189.10.12-10 341.0 ± 0% 272.0 ± 0% -20.23% (p=0.002 n=6)
_IPFilter/192.168.4.5/16-10 341.0 ± 0% 272.0 ± 0% -20.23% (p=0.002 n=6)
geomean 341.0 272.0 -20.23%
│ old.txt │ new.txt │
│ allocs/op │ allocs/op vs base │
_IPFilter/127.0.0.1-10 8.000 ± 0% 8.000 ± 0% ~ (p=1.000 n=6) ¹
_IPFilter/192.168.0.1-192.189.10.12-10 8.000 ± 0% 8.000 ± 0% ~ (p=1.000 n=6) ¹
_IPFilter/192.168.4.5/16-10 8.000 ± 0% 8.000 ± 0% ~ (p=1.000 n=6) ¹
geomean 8.000 8.000 +0.00%
¹ all samples are equal
```
|
|
We can optimize even more here by eliminating the use of the map
and opting to use a 256 len array instead for the lookup.
```
goos: darwin
goarch: arm64
pkg: github.com/grafana/loki/v3/pkg/logql/log
cpu: Apple M2 Pro
│ old.txt │ new.txt │
│ sec/op │ sec/op vs base │
_IPFilter/127.0.0.1-10 4.609µ ± 1% 3.155µ ± 1% -31.55% (p=0.002 n=6)
_IPFilter/192.168.0.1-192.189.10.12-10 4.621µ ± 2% 3.328µ ± 10% -27.98% (p=0.002 n=6)
_IPFilter/192.168.4.5/16-10 4.388µ ± 2% 2.947µ ± 1% -32.84% (p=0.002 n=6)
geomean 4.538µ 3.139µ -30.82%
│ old.txt │ new.txt │
│ B/op │ B/op vs base │
_IPFilter/127.0.0.1-10 272.00 ± 0% 32.00 ± 0% -88.24% (p=0.002 n=6)
_IPFilter/192.168.0.1-192.189.10.12-10 272.00 ± 0% 32.00 ± 0% -88.24% (p=0.002 n=6)
_IPFilter/192.168.4.5/16-10 272.00 ± 0% 32.00 ± 0% -88.24% (p=0.002 n=6)
geomean 272.0 32.00 -88.24%
│ old.txt │ new.txt │
│ allocs/op │ allocs/op vs base │
_IPFilter/127.0.0.1-10 8.000 ± 0% 3.000 ± 0% -62.50% (p=0.002 n=6)
_IPFilter/192.168.0.1-192.189.10.12-10 8.000 ± 0% 3.000 ± 0% -62.50% (p=0.002 n=6)
_IPFilter/192.168.4.5/16-10 8.000 ± 0% 3.000 ± 0% -62.50% (p=0.002 n=6)
geomean 8.000 3.000 -62.50%
```
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What this PR does / why we need it:
Small micro optimizations to save some allocations for the IP filter in logql.
Which issue(s) this PR fixes:
Fixes #
Special notes for your reviewer:
Checklist
CONTRIBUTING.mdguide (required)featPRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.docs/sources/setup/upgrade/_index.mdproduction/helm/loki/Chart.yamland updateproduction/helm/loki/CHANGELOG.mdandproduction/helm/loki/README.md. Example PRdeprecated-config.yamlanddeleted-config.yamlfiles respectively in thetools/deprecated-config-checkerdirectory. Example PR