mirror of
https://github.com/go-gitea/gitea
synced 2024-12-24 17:44:27 +00:00
d2ea21d0d8
* use certmagic for more extensible/robust ACME cert handling * accept TOS based on config option Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: Lauris BH <lauris@nix.lv>
135 lines
5.1 KiB
Markdown
Vendored
135 lines
5.1 KiB
Markdown
Vendored
# :zap: zap [![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov]
|
|
|
|
Blazing fast, structured, leveled logging in Go.
|
|
|
|
## Installation
|
|
|
|
`go get -u go.uber.org/zap`
|
|
|
|
Note that zap only supports the two most recent minor versions of Go.
|
|
|
|
## Quick Start
|
|
|
|
In contexts where performance is nice, but not critical, use the
|
|
`SugaredLogger`. It's 4-10x faster than other structured logging
|
|
packages and includes both structured and `printf`-style APIs.
|
|
|
|
```go
|
|
logger, _ := zap.NewProduction()
|
|
defer logger.Sync() // flushes buffer, if any
|
|
sugar := logger.Sugar()
|
|
sugar.Infow("failed to fetch URL",
|
|
// Structured context as loosely typed key-value pairs.
|
|
"url", url,
|
|
"attempt", 3,
|
|
"backoff", time.Second,
|
|
)
|
|
sugar.Infof("Failed to fetch URL: %s", url)
|
|
```
|
|
|
|
When performance and type safety are critical, use the `Logger`. It's even
|
|
faster than the `SugaredLogger` and allocates far less, but it only supports
|
|
structured logging.
|
|
|
|
```go
|
|
logger, _ := zap.NewProduction()
|
|
defer logger.Sync()
|
|
logger.Info("failed to fetch URL",
|
|
// Structured context as strongly typed Field values.
|
|
zap.String("url", url),
|
|
zap.Int("attempt", 3),
|
|
zap.Duration("backoff", time.Second),
|
|
)
|
|
```
|
|
|
|
See the [documentation][doc] and [FAQ](FAQ.md) for more details.
|
|
|
|
## Performance
|
|
|
|
For applications that log in the hot path, reflection-based serialization and
|
|
string formatting are prohibitively expensive — they're CPU-intensive
|
|
and make many small allocations. Put differently, using `encoding/json` and
|
|
`fmt.Fprintf` to log tons of `interface{}`s makes your application slow.
|
|
|
|
Zap takes a different approach. It includes a reflection-free, zero-allocation
|
|
JSON encoder, and the base `Logger` strives to avoid serialization overhead
|
|
and allocations wherever possible. By building the high-level `SugaredLogger`
|
|
on that foundation, zap lets users *choose* when they need to count every
|
|
allocation and when they'd prefer a more familiar, loosely typed API.
|
|
|
|
As measured by its own [benchmarking suite][], not only is zap more performant
|
|
than comparable structured logging packages — it's also faster than the
|
|
standard library. Like all benchmarks, take these with a grain of salt.<sup
|
|
id="anchor-versions">[1](#footnote-versions)</sup>
|
|
|
|
Log a message and 10 fields:
|
|
|
|
| Package | Time | Time % to zap | Objects Allocated |
|
|
| :------ | :--: | :-----------: | :---------------: |
|
|
| :zap: zap | 862 ns/op | +0% | 5 allocs/op
|
|
| :zap: zap (sugared) | 1250 ns/op | +45% | 11 allocs/op
|
|
| zerolog | 4021 ns/op | +366% | 76 allocs/op
|
|
| go-kit | 4542 ns/op | +427% | 105 allocs/op
|
|
| apex/log | 26785 ns/op | +3007% | 115 allocs/op
|
|
| logrus | 29501 ns/op | +3322% | 125 allocs/op
|
|
| log15 | 29906 ns/op | +3369% | 122 allocs/op
|
|
|
|
Log a message with a logger that already has 10 fields of context:
|
|
|
|
| Package | Time | Time % to zap | Objects Allocated |
|
|
| :------ | :--: | :-----------: | :---------------: |
|
|
| :zap: zap | 126 ns/op | +0% | 0 allocs/op
|
|
| :zap: zap (sugared) | 187 ns/op | +48% | 2 allocs/op
|
|
| zerolog | 88 ns/op | -30% | 0 allocs/op
|
|
| go-kit | 5087 ns/op | +3937% | 103 allocs/op
|
|
| log15 | 18548 ns/op | +14621% | 73 allocs/op
|
|
| apex/log | 26012 ns/op | +20544% | 104 allocs/op
|
|
| logrus | 27236 ns/op | +21516% | 113 allocs/op
|
|
|
|
Log a static string, without any context or `printf`-style templating:
|
|
|
|
| Package | Time | Time % to zap | Objects Allocated |
|
|
| :------ | :--: | :-----------: | :---------------: |
|
|
| :zap: zap | 118 ns/op | +0% | 0 allocs/op
|
|
| :zap: zap (sugared) | 191 ns/op | +62% | 2 allocs/op
|
|
| zerolog | 93 ns/op | -21% | 0 allocs/op
|
|
| go-kit | 280 ns/op | +137% | 11 allocs/op
|
|
| standard library | 499 ns/op | +323% | 2 allocs/op
|
|
| apex/log | 1990 ns/op | +1586% | 10 allocs/op
|
|
| logrus | 3129 ns/op | +2552% | 24 allocs/op
|
|
| log15 | 3887 ns/op | +3194% | 23 allocs/op
|
|
|
|
## Development Status: Stable
|
|
|
|
All APIs are finalized, and no breaking changes will be made in the 1.x series
|
|
of releases. Users of semver-aware dependency management systems should pin
|
|
zap to `^1`.
|
|
|
|
## Contributing
|
|
|
|
We encourage and support an active, healthy community of contributors —
|
|
including you! Details are in the [contribution guide](CONTRIBUTING.md) and
|
|
the [code of conduct](CODE_OF_CONDUCT.md). The zap maintainers keep an eye on
|
|
issues and pull requests, but you can also report any negative conduct to
|
|
oss-conduct@uber.com. That email list is a private, safe space; even the zap
|
|
maintainers don't have access, so don't hesitate to hold us to a high
|
|
standard.
|
|
|
|
<hr>
|
|
|
|
Released under the [MIT License](LICENSE.txt).
|
|
|
|
<sup id="footnote-versions">1</sup> In particular, keep in mind that we may be
|
|
benchmarking against slightly older versions of other packages. Versions are
|
|
pinned in the [benchmarks/go.mod][] file. [↩](#anchor-versions)
|
|
|
|
[doc-img]: https://godoc.org/go.uber.org/zap?status.svg
|
|
[doc]: https://godoc.org/go.uber.org/zap
|
|
[ci-img]: https://travis-ci.com/uber-go/zap.svg?branch=master
|
|
[ci]: https://travis-ci.com/uber-go/zap
|
|
[cov-img]: https://codecov.io/gh/uber-go/zap/branch/master/graph/badge.svg
|
|
[cov]: https://codecov.io/gh/uber-go/zap
|
|
[benchmarking suite]: https://github.com/uber-go/zap/tree/master/benchmarks
|
|
[benchmarks/go.mod]: https://github.com/uber-go/zap/blob/master/benchmarks/go.mod
|
|
|