BaconPdf is a new PDF library for PHP with a clean interface. It comes with both writing and reading capabilities for PDFs up to version 1.7.
You can find the latest documentation over at Read the Docs: https://baconpdf.readthedocs.org/en/latest/
When doing performance sensitive changes to core classes, make sure to run the benchmarks before and after making your changes to ensure that they don't cause a huge impact:
php vendor/bin/athletic -p benchmark -b vendor/autoload.php