Since Camel 2.20

The camel-headersmap is a faster implementation of a case-insenstive map which can be plugged in and used by Camel at runtime to have slight faster performance in the Camel Message headers.

Auto-detection from classpath

To use this implementation all you need to do is to add the camel-headersmap dependency to the classpath, and Camel should auto-detect this on startup and log as follows:

Detected and using HeadersMapFactory: camel-headersmap