# Profile Laggy Ticks Using /spark profiler
### What Does `/spark profiler` Do?
The `/spark profiler` command captures detailed performance data. With the `--only-ticks-over` option, you can filter the profile to include only laggy ticks.
### How to Use It
1. **Choose a Threshold**
Use the tick duration from Step 1 as a reference. For example, if laggy ticks exceed 150 milliseconds:
```
/spark profiler --only-ticks-over 150
```
2. **Run the Profiler**
- The profiler will start recording, but only for ticks exceeding the threshold.
- Let it run long enough to capture lag events.
3. **Stop the Profiler**
Use:
```
/spark profiler stop
```
4. **Inspect the Results**
Open the profiling report and analyze the data. The laggy ticks will stand out, making it easier to identify the cause.
### Example
In the profiler output, you might see a high percentage of time spent on a plugin, mod, or player action. This helps isolate the problem.
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