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201 changes: 201 additions & 0 deletions LICENSE
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Apache License
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115 changes: 115 additions & 0 deletions README.md
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# Zerologr

The fastest [logr](https://github.com/go-logr/logr) implementation using
[Zerolog](https://github.com/rs/zerolog).

## Usage

```go
import (
"os"

"github.com/go-logr/logr"
"github.com/hn8/zerologr"
"github.com/rs/zerolog"
)

func main() {
zerologr.NameFieldName = "logger"
zerologr.NameSeparator = "/"

zl := zerolog.New(os.Stderr)
var log logr.Logger = zerologr.New(&zl)

log.Info("Logr in action!", "the answer", 42)
}
```

## Implementation Details

For the most part, concepts in Zerolog correspond directly with those in logr.

Levels in logr correspond to custom debug levels in Zerolog. Any given level
in logr is represents by `zerologLevel = 1 - logrLevel`.

For example `V(2)` is equivalent to Zerolog's `TraceLevel`, while `V(1)` is
equivalent to Zerolog's `DebugLevel`.

## Benchmark

```
go version go1.16.6 linux/amd64
cpu: Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
BenchmarkDiscardInfoOneArg-8 1247884 953.4 ns/op 176 B/op 4 allocs/op
BenchmarkDiscardInfoSeveralArgs-8 721035 1484 ns/op 336 B/op 6 allocs/op
BenchmarkDiscardV0Info-8 770527 1486 ns/op 336 B/op 6 allocs/op
BenchmarkDiscardV9Info-8 9779283 137.8 ns/op 176 B/op 2 allocs/op
BenchmarkDiscardError-8 677576 1542 ns/op 336 B/op 6 allocs/op
BenchmarkDiscardWithValues-8 5563468 225.2 ns/op 192 B/op 3 allocs/op
BenchmarkDiscardWithName-8 20706103 58.52 ns/op 64 B/op 1 allocs/op
BenchmarkFuncrInfoOneArg-8 1255844 948.2 ns/op 176 B/op 4 allocs/op
BenchmarkFuncrInfoSeveralArgs-8 802514 1491 ns/op 336 B/op 6 allocs/op
BenchmarkFuncrV0Info-8 795092 1480 ns/op 336 B/op 6 allocs/op
BenchmarkFuncrV9Info-8 9467601 140.3 ns/op 176 B/op 2 allocs/op
BenchmarkFuncrError-8 791719 1528 ns/op 336 B/op 6 allocs/op
BenchmarkFuncrWithValues-8 5428614 222.8 ns/op 192 B/op 3 allocs/op
BenchmarkFuncrWithName-8 18420804 62.07 ns/op 64 B/op 1 allocs/op
```

stdr: https://github.com/go-logr/stdr/pull/14

```
BenchmarkDiscardInfoOneArg-8 1319188 892.8 ns/op 232 B/op 8 allocs/op
BenchmarkDiscardInfoSeveralArgs-8 742125 1580 ns/op 552 B/op 14 allocs/op
BenchmarkDiscardV0Info-8 755325 1621 ns/op 552 B/op 14 allocs/op
BenchmarkDiscardV9Info-8 8628398 133.5 ns/op 176 B/op 2 allocs/op
BenchmarkDiscardError-8 693415 1715 ns/op 600 B/op 16 allocs/op
BenchmarkDiscardWithValues-8 n 4856173 242.6 ns/op 208 B/op 3 allocs/op
BenchmarkDiscardWithName-8 12319874 85.29 ns/op 80 B/op 1 allocs/op
BenchmarkFuncrInfoOneArg-8 1332094 904.2 ns/op 232 B/op 8 allocs/op
BenchmarkFuncrInfoSeveralArgs-8 689158 1561 ns/op 552 B/op 14 allocs/op
BenchmarkFuncrV0Info-8 769890 1629 ns/op 552 B/op 14 allocs/op
BenchmarkFuncrV9Info-8 8916390 138.0 ns/op 176 B/op 2 allocs/op
BenchmarkFuncrError-8 693705 1723 ns/op 600 B/op 16 allocs/op
BenchmarkFuncrWithValues-8 4718301 251.3 ns/op 208 B/op 3 allocs/op
BenchmarkFuncrWithName-8 12068954 91.43 ns/op 80 B/op 1 allocs/op
```

glogr: https://github.com/go-logr/glogr/pull/16

```
BenchmarkDiscardInfoOneArg-8 464660 2199 ns/op 400 B/op 9 allocs/op
BenchmarkDiscardInfoSeveralArgs-8 411957 2908 ns/op 664 B/op 15 allocs/op
BenchmarkDiscardV0Info-8 382228 2879 ns/op 664 B/op 15 allocs/op
BenchmarkDiscardV9Info-8 9592717 138.8 ns/op 176 B/op 2 allocs/op
BenchmarkDiscardError-8 327556 3160 ns/op 696 B/op 17 allocs/op
BenchmarkDiscardWithValues-8 5553832 223.2 ns/op 192 B/op 3 allocs/op
BenchmarkDiscardWithName-8 17091950 71.42 ns/op 64 B/op 1 allocs/op
BenchmarkFuncrInfoOneArg-8 546212 2196 ns/op 400 B/op 9 allocs/op
BenchmarkFuncrInfoSeveralArgs-8 396565 2890 ns/op 664 B/op 15 allocs/op
BenchmarkFuncrV0Info-8 421482 2872 ns/op 664 B/op 15 allocs/op
BenchmarkFuncrV9Info-8 8809033 138.8 ns/op 176 B/op 2 allocs/op
BenchmarkFuncrError-8 383487 3121 ns/op 696 B/op 17 allocs/op
BenchmarkFuncrWithValues-8 5243806 221.5 ns/op 192 B/op 3 allocs/op
BenchmarkFuncrWithName-8 15284324 70.80 ns/op 64 B/op 1 allocs/op
```

zapr: https://github.com/go-logr/zapr/pull/33

```
BenchmarkDiscardInfoOneArg-8 273366 4181 ns/op 713 B/op 15 allocs/op
BenchmarkDiscardInfoSeveralArgs-8 227490 5202 ns/op 1130 B/op 17 allocs/op
BenchmarkDiscardV0Info-8 238732 5162 ns/op 1129 B/op 17 allocs/op
BenchmarkDiscardV9Info-8 9315973 141.0 ns/op 176 B/op 2 allocs/op
BenchmarkDiscardError-8 192272 5543 ns/op 1258 B/op 18 allocs/op
BenchmarkDiscardWithValues-8 831561 1432 ns/op 1544 B/op 10 allocs/op
BenchmarkDiscardWithName-8 5448158 201.5 ns/op 216 B/op 4 allocs/op
BenchmarkFuncrInfoOneArg-8 261658 4174 ns/op 713 B/op 15 allocs/op
BenchmarkFuncrInfoSeveralArgs-8 227588 5172 ns/op 1130 B/op 17 allocs/op
BenchmarkFuncrV0Info-8 227376 5158 ns/op 1130 B/op 17 allocs/op
BenchmarkFuncrV9Info-8 8277498 147.4 ns/op 176 B/op 2 allocs/op
BenchmarkFuncrError-8 205752 5576 ns/op 1258 B/op 18 allocs/op
BenchmarkFuncrWithValues-8 939271 1392 ns/op 1544 B/op 10 allocs/op
BenchmarkFuncrWithName-8 5572585 208.5 ns/op 216 B/op 4 allocs/op
```
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