[Feature]: Increase memory with a flag / Support Node Flags

[damianobarbati]

Could webpack-cli handle the memory limit increase with a flag?

Right now we have to manually use:
node --max_old_space_size=4096 node_modules/webpack/bin/webpack.js

A simple flag would be very nice instead:
webpack --increase-memory 4096

Or multiple custom node options like:
webpack --node.increase-memory 4096 --node.trace-deprecation --node.experimental-modules

[matheus1lva]

I'm down to grab this, but i'm not really sure where do i add the flags.
Is this similar to this?

webpack-cli/bin/convert-argv.js

Line 29 in 8787043

.concat("process.env.NODE_ENV=\"production\"");

[montogeek]

@playma256 No, it is part of the process args, not process environment variables

[montogeek]

You could do something like argv["max_old_space_size"] = 4096 somewhere.
I believe this shouldn't be part of webpack, it should be handled by the user.

[matheus1lva]

I expressed myself in a wrong way, sorry for that.
I understand it's not a process args, but i meant to do this the same way that the production mode is handled.
Anyways. You answered my question!
Thank you @montogeek

I'm grabbing this issue.

[matheus1lva]

I was having a look how to implement those flags, and i've reached a fork road. I'm not able to override node flag options when a process already started, so i was thinking... spawning a child process passing down v8 flags would be a cumbersome idea or is there a way (i actually dont know any...) to update v8 flags when a process already started?

What do you all think?

Edit
Apparently that is what mocha does, they allow passing v8 flags into the CLI and spawns another process.
Link for reference.

[evenstensberg]

Getting back to you on this. This might not be possible without invoking node ./path/to/webpack

[matheus1lva]

is there a way to run a single test only? A single binary test?

[ematipico]

Not at the moment :(

[evenstensberg]

This impl can be used with #15 . We keep track of pId and restart a process once it's done ( I think )

[webpack-bot]

This issue had no activity for at least half a year.

It's subject to automatic issue closing if there is no activity in the next 15 days.

[damianobarbati]

Can npx used to accomplish the result? i.e: npx -n=' --max_old_space_size=4096'
Not sure how to inspect max memory limit for current process in js.

[evenstensberg]

Yes if npm supports injection of args. We cannot use this as a fix to us, as the flags needs to be supported by default not by running npx

[webpack-bot]

This issue had no activity for at least half a year.

It's subject to automatic issue closing if there is no activity in the next 15 days.