Bug ID 1112049: Performance improvement for checking signature exclusions on header

Last Modified: Apr 28, 2025

Affected Product(s):
BIG-IP ASM(all modules)

Fixed In:
17.1.0

Opened: Jun 03, 2022

Severity: 4-Minor

Symptoms

As part of a general performance improvement effort, we were looking into profiling data and observed that in many cases a lot of CPU is wasted, in the process to find out whether a specific signature is excluded on a specific header.

Impact

High CPU usage when checking for signature header exclusions.

Conditions

Signatures are enabled in ASM.

Workaround

N/A

Fix Information

Optimized the code responsible for checking signature exclusions on header.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips