Explore process wide cache

[stefanpenner]

Explore process wide cache, this way we can likely avoid perf slowdowns due to unrelated node_module duplication or layout.

[davecombs]

I've been thinking about this the last few days, too. My original thought was to do something similar to what happens in package-info-cache (to at least cache the package.json contents), but not limited to addons. Question is whether this is just the same as the require cache.

[stefanpenner]

i don't mean a package.json cache, i mean ensuring the CacheGroup can be shared even among duplicated dependencies.

[davecombs]

Ah, yes. Totally makes sense, and I agree. Anything to remove duplication would be helpful.