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Improve documentation of cache method

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Lovell Fuller 2014-02-28 22:37:59 +00:00
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@ -103,11 +103,11 @@ sharp.resize("input.jpg", sharp.buffer.webp, 200, 300, {canvas: sharp.canvas.emb
### cache([limit])
If `limit` is provided, set the `vips` internal cache limit to this value in MB. The default value is 100.
If `limit` is provided, set the (soft) limit of _libvips_ working/cache memory to this value in MB. The default value is 100.
Always returns cache statistics, namely current usage, high water mark and maximum limit.
This method always returns cache statistics, useful for determining how much working memory is required for a particular task.
The high water mark may be higher than the maximum limit.
Warnings such as _Application transferred too many scanlines_ are a good indicator you've set this value too low.
```javascript
var stats = sharp.cache(); // { current: 98, high: 115, limit: 100 }