mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-18 14:40:26 +01:00
a5c427bac4
Allocations are reduced by implementing custom json parser via fastjson
lib.
The change also re-uses `promInstant` object in attempt to reduce number
of
allocations when parsing big responses, as usually happens with heavy
recording rules.
```
name old allocs/op new allocs/op delta
ParsePrometheusResponse/Instant-10 9.65k ± 0% 5.60k ± 0% ~ (p=1.000 n=1+1)
```
Signed-off-by: hagen1778 <roman@victoriametrics.com>
---------
Signed-off-by: hagen1778 <roman@victoriametrics.com>
(cherry picked from commit 4f0525852f)
74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
package datasource
|
|
|
|
import (
|
|
"reflect"
|
|
"testing"
|
|
)
|
|
|
|
func TestPromInstant_UnmarshalPositive(t *testing.T) {
|
|
f := func(data string, exp []Metric) {
|
|
t.Helper()
|
|
var pi promInstant
|
|
err := pi.Unmarshal([]byte(data))
|
|
if err != nil {
|
|
t.Fatalf("unexpected unmarshal err %v; \n %v", err, string(data))
|
|
}
|
|
got, _ := pi.metrics()
|
|
if !reflect.DeepEqual(got, exp) {
|
|
t.Fatalf("expected to get:\n%v\ngot instead:\n%v", exp, got)
|
|
}
|
|
}
|
|
|
|
f(`[{"metric":{"__name__":"up"},"value":[1583780000,"42"]}]`, []Metric{
|
|
{
|
|
Labels: []Label{{Name: "__name__", Value: "up"}},
|
|
Timestamps: []int64{1583780000},
|
|
Values: []float64{42},
|
|
},
|
|
})
|
|
f(`[
|
|
{"metric":{"__name__":"up"},"value":[1583780000,"42"]},
|
|
{"metric":{"__name__":"foo"},"value":[1583780001,"7"]},
|
|
{"metric":{"__name__":"baz", "instance":"bar"},"value":[1583780002,"8"]}]`, []Metric{
|
|
{
|
|
Labels: []Label{{Name: "__name__", Value: "up"}},
|
|
Timestamps: []int64{1583780000},
|
|
Values: []float64{42},
|
|
},
|
|
{
|
|
Labels: []Label{{Name: "__name__", Value: "foo"}},
|
|
Timestamps: []int64{1583780001},
|
|
Values: []float64{7},
|
|
},
|
|
{
|
|
Labels: []Label{{Name: "__name__", Value: "baz"}, {Name: "instance", Value: "bar"}},
|
|
Timestamps: []int64{1583780002},
|
|
Values: []float64{8},
|
|
},
|
|
})
|
|
}
|
|
|
|
func TestPromInstant_UnmarshalNegative(t *testing.T) {
|
|
f := func(data string) {
|
|
t.Helper()
|
|
var pi promInstant
|
|
err := pi.Unmarshal([]byte(data))
|
|
if err == nil {
|
|
t.Fatalf("expected to get an error; got nil instead")
|
|
}
|
|
}
|
|
f(``)
|
|
f(`foo`)
|
|
f(`[{"metric":{"__name__":"up"},"value":[1583780000,"42"]},`)
|
|
f(`[{"metric":{"__name__"},"value":[1583780000,"42"]},`)
|
|
// no `metric` object
|
|
f(`[{"value":[1583780000,"42"]}]`)
|
|
// no `value` object
|
|
f(`[{"metric":{"__name__":"up"}}]`)
|
|
// less than 2 values in `value` object
|
|
f(`[{"metric":{"__name__":"up"},"value":["42"]}]`)
|
|
f(`[{"metric":{"__name__":"up"},"value":[1583780000]}]`)
|
|
// non-numeric sample value
|
|
f(`[{"metric":{"__name__":"up"},"value":[1583780000,"foo"]}]`)
|
|
}
|