Parsing YML files from DevicesDetection plugin takes up to 100ms per Tracking API request. This was rather unacceptable performance... We want to move DevicesDetection to first class citizen in #3962
Stefan implemented a clever fix, to cache the parsed YML arrays in the tracker cache.
This was done in:
Now it takes 1 ms or less to load in memory the cached files. good caching FTW
In 96cb53285646ac130dc9da2945dc7f16cadf3510: Refs #4683 Refactor this little bit