Composer 2.0
has just reached its first Release Candidate version, making it closer to a 
first stable release. It has much better performance and memory usage than 
Composer 1 and improves the way packages are downloaded to lower the time it
takes to run commands like composer install or composer update.
Even if Composer 2 is not stable yet, you can already use it in your SymfonyInsight projects.
When running the composer install command during the analysis, we are now
using Composer version 1 or version 2 depending on the composer.lock of 
your project. SymfonyInsight provides Composer binaries for both versions and
automatically choose the right version for your project.
Feel free to test Composer 2 in a branch!