Is it possible to run tasks in parallel on the same host?

[dingo-d]

I have a setup where I need to deploy WordPress multisite themes, to the same host. I have 3 different themes that need to be built and then deployed.

But because every theme has a bundling process (npm install and then npm run build, with some cleanup) and composer install step, this all ends up taking a considerable time to finish.

I'm wondering if the parallel option can be used for the parallel execution of tasks? Or would that require something like swoole to run? Because deployer is a php script at the end of the day.

It would be cool if it would be possible to have

task('build-theme-1', function() {...})->parallel();
task('build-theme-2', function() {...})->parallel();
task('build-theme-3', function() {...})->parallel();

And those three tasks, when called inside the

task('deploy', [
	'build-theme-1',
	'build-theme-2',
	'build-theme-3',
	'release',
	'cleanup',
])->desc('Deploy your project');

would run in parallel, and once all are done, the release task would run, etc.

Is something like this possible, or not?

I'm not sure how the existing parallel option works, but it seems to me it's only useful if one is deploying to multiple hosts.