bug#40634: Massive pattern list handling with -E format seems very slow since 2.28.

2020-04-14 Thread fryasu
Hi, Massive pattern list handling with -E format seems very slow, since grep 2.28. Conversion from -E format to -F format may have problem about performance. When the processing time is measured by the script below, the result isobviously different between 2.28 and 2.27. #!/bin/bash export

bug#40634: Massive pattern list handling with -E format seems very slow since 2.28.

2020-04-20 Thread fryasu
Hi, I immediately tried the attached patch, and was able to confirmthat grep perfomance is improved. Our work to find thousands of patterns in a file with tens of thousand lines is going extremely smoothly. I'm glad for your quick response. Thank you.