Include 0-import cost
Andarist opened this issue · comments
It would be great if it could also always report 0-import cost. What I mean is basically always also trying entry with this:
Line 12 in 8fc7d17
It would serve as a good basic test for treeshakeability as a whole. To get reliable tests for this we'd have to remove sideEffects: false
from the imported module - or force webpack to ignore it. Otherwise, it most likely would always report 0, even for non-treeshakeable modules.
I tried that, but it is basically interpreted as a side-effect full import, always yielding the same result as * as
from what I tried, so didn't seen to add any value.
I've done preliminary investigation and it seems that's the fault of used import-size
package. It "transforms" import "${library}";
input to import * as tmp from "${library}";console.log(tmp);
. Making it effectively the same as import * as "${library}";
input.
This happens here:
https://github.com/wix/import-cost/blob/a8b24cce7ef4bc7836d28a2913d3788eabc56cda/packages/import-cost/src/babelParser.js#L112
So to make what I've requested to work we should reach out to them to see if they would like to support calculating costs for bare imports, probably behind a flag or something.