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---
title: "PerformanceScriptTiming: executionStart property"
short-title: executionStart
slug: Web/API/PerformanceScriptTiming/executionStart
page-type: web-api-instance-property
status:
- experimental
browser-compat: api.PerformanceScriptTiming.executionStart
---
{{SeeCompatTable}}{{APIRef("Performance API")}}
The **`executionStart`** read-only property of the {{domxref("PerformanceScriptTiming")}} interface returns a {{domxref("DOMHighResTimeStamp")}} indicating the time when the script compilation finished and execution started.
## Value
A {{domxref("DOMHighResTimeStamp")}}.
## Examples
See [Long animation frame timing](/en-US/docs/Web/API/Performance_API/Long_animation_frame_timing#examples) for examples related to the Long Animation Frames API.
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- [Long animation frame timing](/en-US/docs/Web/API/Performance_API/Long_animation_frame_timing)
- {{domxref("PerformanceLongAnimationFrameTiming")}}