Slow rebuild times for ts-loader@2.0.1

[pelotom]

Something appears to have changed between version 2.0.0 and 2.0.1 such that my rebuild times in --watch mode have ballooned from ~2s to ~20s. Time for first build has remained the same.

[johnnyreilly]

I'm not experiencing the same myself; I'm not sure why you would be.

For what it's worth there was a breaking change in webpack that we had to cater for; code-wise the changes were pretty marginal: https://github.com/TypeStrong/ts-loader/releases/tag/v2.0.1

(For more background on the breaking change read this)

BTW are you running webpack 2?

[pelotom]

Yes, I am running webpack 2, but I've tried with both webpack 1 and 2 and the problem exists in either case.

[johnnyreilly]

Do you want to share your setup?

[pelotom]

Unfortunately this is a private company repo so I can't share it wholesale. I can see about trying to create a minimal example that reproduces it when I get some time.

[johnnyreilly]

Actually, I'm starting to wonder if this is related to the mtimes to getTimes() switch. See discussion in #497

[mmorton]

I am seeing the same thing on a large project that I too unfortunately cannot share. Rebuild is ~30s with 2.0.1 and only ~6s with 2.0.0. I can switch back and forth between versions and consistently see those numbers.

[johnnyreilly]

Thanks for reporting. We've got a PR that looks like it may resolve the issue: #500

However since i haven't experienced it myself i can't be sure. Would you be able to give this PR a test drive and confirm if it fixes things?

[johnnyreilly]

Hopefully #500 (due to ship with 2.0.2) will fix this - closing for now.