---
title: profiler package
description: >
  The `profiler` package provides performance profiling tools for Flux queries and operations.
menu:
  flux_v0_ref:
    name: profiler 
    parent: stdlib
    identifier: profiler
weight: 11
cascade:
  flux/v0/tags: [optimize]
  introduced: 0.82.0
---

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The `profiler` package provides performance profiling tools for Flux queries and operations.

Profile results are returned as an extra result in the response named according to the profiles which are enabled.

## Options

```js
option profiler.enabledProfilers = [""]
```
 
### enabledProfilers

`enabledProfilers` is a list of profilers to enable during execution.

## Available profilers
- [query](#query)
- [operator](#operator)

### query
Provides statistics about the execution of an entire Flux script.
When enabled, results include a table with the following columns:

- **TotalDuration**: total query duration in nanoseconds.
- **CompileDuration**: number of nanoseconds spent compiling the query.
- **QueueDuration**: number of nanoseconds spent queueing.
- **RequeueDuration**: number of nanoseconds spent requeueing.
- **PlanDuration**: number of nanoseconds spent planning the query.
- **ExecuteDuration**: number of nanoseconds spent executing the query.
- **Concurrency**: number of goroutines allocated to process the query.
- **MaxAllocated**: maximum number of bytes the query allocated.
- **TotalAllocated**: total number of bytes the query allocated (includes memory that was freed and then used again).
- **RuntimeErrors**: error messages returned during query execution.
- **flux/query-plan**: Flux query plan.
- **influxdb/scanned-values**: value scanned by InfluxDB.
- **influxdb/scanned-bytes**: number of bytes scanned by InfluxDB.

### operator
The `operator` profiler output statistics about each operation in a query.
[Operations executed in the storage tier](/influxdb/cloud/query-data/optimize-queries/#start-queries-with-pushdown-functions)
return as a single operation.
When the `operator` profile is enabled, results include a table with a row
for each operation and the following columns:

- **Type:** operation type
- **Label:** operation name
- **Count:** total number of times the operation executed
- **MinDuration:** minimum duration of the operation in nanoseconds
- **MaxDuration:** maximum duration of the operation in nanoseconds
- **DurationSum:** total duration of all operation executions in nanoseconds
- **MeanDuration:** average duration of all operation executions in nanoseconds