perf: option to exclude cached from stats

[SuperOleg39]

This PR contains a:

• [x] bugfix

Motivation / Use-Case

stats.toJson is a heavy method, and is called for every incremental build.

I made a webpack build performance profiling, and found that stats.toJson from webpack-hot-middleware takes around 50ms work - while complete incremental build for small change is cost around 200-250ms fo CPU work.

After trying to change statsOptions, I found that cached: true option is the slowest, and with disabled cached: false full stats.toJson call cost around 10ms - five times faster.

Looks like we don't need this option for most projects, but for backward compatibility I just add one parameter to rewrite it.

Breaking Changes

This PR is backward compatible with previous changes in https://github.com/webpack-contrib/webpack-hot-middleware/pull/336

Additional Info

CPU profiles included tramvai-cli.cached-false.cpuprofile.zip tramvai-cli.cached-true.cpuprofile.zip

No cached:

And cached, as default:

[linux-foundation-easycla[bot]]

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• :white_check_mark: login: SuperOleg39 / name: SuperOleg39 (f1cf68bd5e0b89e4ed4e773cd98a6bad84148c8c)

[SuperOleg39]

@alexander-akait Hello! Want to ask you for PR review 🙏

[SuperOleg39]

I am fine with it, I will merge and release this tomorrow, I want to look at code why it is slow and maybe we need to put TODO about change it in the future major release

Thanks a lot!

Say if you need any CPU profile traces for debugging.

[SuperOleg39]

@alexander-akait hello! Can you merge and release this fix please?

[SuperOleg39]

@alexander-akait hello! Just want to remind about thix fix 🙏

[alexander-akait]

Sorry for delay, I will do releasae tomorrow

[alexander-akait]

@SuperOleg39 Hm, until I released it, maybe we can make it more flex, let's allow to override stats options (make an option for this) and use const statsOptions = { /* Default options */ children: true, ...opts.statsOptions }, so you can override everything and make it even faster

[SuperOleg39]

@SuperOleg39 Hm, until I released it, maybe we can make it more flex, let's allow to override stats options (make an option for this) and use const statsOptions = { /* Default options */ children: true, ...opts.statsOptions }, so you can override everything and make it even faster

@alexander-akait Something like this? https://github.com/webpack-contrib/webpack-hot-middleware/pull/444