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A comment on Case Study: Npm uses Rust for its CPU-bound bottlenecks [pdf]. Parent comment

Re:Case Study: Npm uses Rust for its CPU-bound bottlenecks [... by Dylan16807 on Sunday March 03, 2019 @02:29PM (#19296300)
> Anything will be CPU-heavy if you give it enough work.

Not in a relative sense. If authorization is 5% of the work, scaling it leaves it at 5% of the work, and it's never a bottleneck. Authorization was being a significant bottleneck, not a tiny percent, and that is somewhat surprising.

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Re:Case Study: Npm uses Rust for its CPU-bound bottlenecks [... by andy_ppp on Sunday March 03, 2019 @03:10PM (#19296524)
Obviously authorisation will be a huge overhead compared to sendfile + nginx right? Am I misunderstanding what npm does?
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Re:Case Study: Npm uses Rust for its CPU-bound bottlenecks [... by Dylan16807 on Sunday March 03, 2019 @05:34PM (#19297378)
I mean, to use sendfile you need to open the file, and that does a permission check too...
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Re:Case Study: Npm uses Rust for its CPU-bound bottlenecks [... by andy_ppp on Sunday March 03, 2019 @09:54PM (#19298444)
No I'm talking about private NPM right. The perms on the file system are not equal to (or as costly as) the auth I need to have to access my private NPM repo.
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