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composer parallel install plugin for Composer 1.x

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This is a composer 1.x plugin that downloads packages in parallel to speed up the installation process.

Announcement: Composer 2 is now available!

This plugin is for Composer1; Composer2 is very fast on its own. Uninstall this plugin and update the Composer itself.


  • composer >=1.0.0 <2.0
  • PHP >=5.3, (suggest >=5.5, because curl_share_init)
  • ext-curl

Install, Updating & Upgrading

$ composer global require hirak/prestissimo


$ composer global remove hirak/prestissimo

Benchmark Example

288s -> 26s

$ composer create-project laravel/laravel laravel1 --no-progress --profile --prefer-dist



prestissimo ^0.3.x

Recognize composer's options. You don't need to set any special configuration.

Composer authentication

To avoid Composer asking for authentication it is recommended to follow the procedure on composer's authentication.

For github.com you could also use an auth.json file with an oauth access token placed on the the same level as your composer.json file:

    "github-oauth": {
        "github.com": "YOUR_GITHUB_ACCESS_TOKEN"


MIT License. See the LICENSE file.