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[chore] metricstransformprocessor: avoid unnecessary new metrics slice when possible #14628

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merged 1 commit into from
Oct 1, 2022
Merged

[chore] metricstransformprocessor: avoid unnecessary new metrics slice when possible #14628

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9 changes: 4 additions & 5 deletions processor/metricstransformprocessor/metrics_transform_processor_otlp.go
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Original file line number Diff line number Diff line change
Expand Up @@ -268,9 +268,9 @@ func (mtp *metricsTransformProcessor) processMetrics(_ context.Context, md pmetr
combinedMetric.MoveTo(metrics.AppendEmpty())
}
case Insert:
newMetrics := pmetric.NewMetricSlice()
newMetrics.EnsureCapacity(metrics.Len())
for i := 0; i < metrics.Len(); i++ {
// Save len, so we don't iterate over the newly generated metrics that are appended at the end.
mLen := metrics.Len()
for i := 0; i < mLen; i++ {
metric := metrics.At(i)
newMetric := transform.MetricIncludeFilter.extractMatchedMetric(metric)
if newMetric == (pmetric.Metric{}) {
Expand All @@ -281,10 +281,9 @@ func (mtp *metricsTransformProcessor) processMetrics(_ context.Context, md pmetr
metric.CopyTo(newMetric)
}
if transformMetric(newMetric, transform) {
newMetric.MoveTo(newMetrics.AppendEmpty())
newMetric.MoveTo(metrics.AppendEmpty())
}
}
newMetrics.MoveAndAppendTo(metrics)
case Update:
metrics.RemoveIf(func(metric pmetric.Metric) bool {
if !transform.MetricIncludeFilter.matchMetric(metric) {
Expand Down