-
Notifications
You must be signed in to change notification settings - Fork 321
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Start to use json-iterator to improve marshalling of HistogramBucket
Signed-off-by: Jeanette Tan <[email protected]>
- Loading branch information
Showing
4 changed files
with
102 additions
and
20 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // Copyright 2013 The Prometheus Authors | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package model | ||
|
|
||
| import ( | ||
| "math" | ||
| "strconv" | ||
|
|
||
| jsoniter "github.com/json-iterator/go" | ||
| ) | ||
|
|
||
| // from https://github.com/prometheus/prometheus/blob/main/util/jsonutil/marshal.go | ||
| // MarshalTimestamp marshals a point timestamp using the passed jsoniter stream. | ||
| func MarshalTimestamp(t int64, stream *jsoniter.Stream) { | ||
| // Write out the timestamp as a float divided by 1000. | ||
| // This is ~3x faster than converting to a float. | ||
| if t < 0 { | ||
| stream.WriteRaw(`-`) | ||
| t = -t | ||
| } | ||
| stream.WriteInt64(t / 1000) | ||
| fraction := t % 1000 | ||
| if fraction != 0 { | ||
| stream.WriteRaw(`.`) | ||
| if fraction < 100 { | ||
| stream.WriteRaw(`0`) | ||
| } | ||
| if fraction < 10 { | ||
| stream.WriteRaw(`0`) | ||
| } | ||
| stream.WriteInt64(fraction) | ||
| } | ||
| } | ||
|
|
||
| // adapted from https://github.com/prometheus/prometheus/blob/main/util/jsonutil/marshal.go | ||
| // MarshalValue marshals a point value using the passed jsoniter stream. | ||
| func MarshalValue(f FloatString, stream *jsoniter.Stream) { | ||
| v := float64(f) | ||
| stream.WriteRaw(`"`) | ||
| // Taken from https://github.com/json-iterator/go/blob/master/stream_float.go#L71 as a workaround | ||
| // to https://github.com/json-iterator/go/issues/365 (jsoniter, to follow json standard, doesn't allow inf/nan). | ||
| buf := stream.Buffer() | ||
| abs := math.Abs(v) | ||
| fmt := byte('f') | ||
| // Note: Must use float32 comparisons for underlying float32 value to get precise cutoffs right. | ||
| if abs != 0 { | ||
| if abs < 1e-6 || abs >= 1e21 { | ||
| fmt = 'e' | ||
| } | ||
| } | ||
| buf = strconv.AppendFloat(buf, v, fmt, -1, 64) | ||
| stream.SetBuffer(buf) | ||
| stream.WriteRaw(`"`) | ||
| } | ||
|
|
||
| // adapted from https://github.com/prometheus/prometheus/blob/main/web/api/v1/api.go | ||
| func MarshalHistogramBucket(b HistogramBucket, stream *jsoniter.Stream) { | ||
| stream.WriteArrayStart() | ||
| stream.WriteInt32(b.Boundaries) | ||
| stream.WriteMore() | ||
| MarshalValue(b.Lower, stream) | ||
| stream.WriteMore() | ||
| MarshalValue(b.Upper, stream) | ||
| stream.WriteMore() | ||
| MarshalValue(b.Count, stream) | ||
| stream.WriteArrayEnd() | ||
| } |