Comparison of nikic/php-parser and the Tolerant PHP Parser when parsing the PHPUnit TestCase (version 5.0 for no particular reason other than it's huge).
Example result:
./vendor/bin/phpbench report --uuid=latest --report='extends:aggregate,cols:[benchmark,revs,its,mem_peak,mode,rstdev]' --time-unit=milliseconds master ◼
suite: 133ee179a3d6f266c949f9486ba0dc8c918fd348, date: 2018-05-03, stime: 22:26:30
+---------------------+------+-----+-------------+----------+--------+
| benchmark | revs | its | mem_peak | mode | rstdev |
+---------------------+------+-----+-------------+----------+--------+
| TolerantParserBench | 10 | 33 | 21,043,208b | 53.934ms | 3.37% |
| PhpParserBench | 10 | 33 | 42,620,512b | 62.045ms | 5.27% |
+---------------------+------+-----+-------------+----------+--------+