Cache when using streams

[kevva]

When using streams we have no information about the src or dest file and therefore can't check whether the optimized file exists in cache or not using https://github.com/kevva/cache-file.

https://npmjs.org/search?q=cache+stream

[sindresorhus]

We do have the source and dest buffer though. So could compare that. I'm just not sure caching should be a part of image-min.

[kevva]

Yeah, but how do we know where to look? And we'd still have to optimize the image before comparing it to the dest buffer which kinda makes the caching redundant.

[sindresorhus]

@kevva disk, sad lol... i really wish ramdisks were a standard OS feature, would make this so much easier.

[kevva]

Closing this as caching probably should be done somewhere else, preferably in grunt-contrib-imagemin or gulp-imagemin.

[sindresorhus]

I agree, but keeping it open here so I don't forget. We should also have an example on how to cache in the readme when we figure it out.