Add method to take a save a JS memory heap snapshot#49125
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This pull request was exported from Phabricator. Differential Revision: D68953788 |
Summary:
Changelog: [internal]
This adds support for taking JS memory heap snapshots from Fantom tests via `Fantom.saveJSMemoryHeapSnapshot`. This can be used in one-off tests to do memory analysis and determine the existence of leaks:
```
// Warm up
Fantom.saveJSMemoryHeapSnapshot('/path/to/my/1.heapsnapshot');
// Do work
Fantom.saveJSMemoryHeapSnapshot('/path/to/my/2.heapsnapshot');
// Clean up
Fantom.saveJSMemoryHeapSnapshot('/path/to/my/3.heapsnapshot');
```
Load these snapshots in Chrome and select "Objects allocated between 1 and 2" in the dropdown to see the potentially leaked objects.
In the future we could introduce additional utilities to analyze the snapshots and do the detection automatically, e.g.:
```
// Warm up
const baseline = Fantom.takeJSMemoryHeapSnapshot();
// Do work
const before = Fantom.takeJSMemoryHeapSnapshot();
// Clean up
const after = Fantom.takeJSMemoryHeapSnapshot();
const leaks = findMemoryLeaks(baseline, before, after);
expect(leaks.sizeKB()).toBeLessThan(THRESHOLD);
```
Reviewed By: rshest
Differential Revision: D68953788
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This pull request was exported from Phabricator. Differential Revision: D68953788 |
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This pull request has been merged in d2a6ff0. |
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This pull request was successfully merged by @rubennorte in d2a6ff0 When will my fix make it into a release? | How to file a pick request? |
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Summary:
Changelog: [internal]
This adds support for taking JS memory heap snapshots from Fantom tests via
Fantom.saveJSMemoryHeapSnapshot. This can be used in one-off tests to do memory analysis and determine the existence of leaks:Load these snapshots in Chrome and select "Objects allocated between 1 and 2" in the dropdown to see the potentially leaked objects.
In the future we could introduce additional utilities to analyze the snapshots and do the detection automatically, e.g.:
Differential Revision: D68953788