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  • Yorick Peterse's avatar
    Added concern for a faster "cache_key" method · 8ee5c3177e6d
    Yorick Peterse authored
    This concern provides an optimized/simplified version of the "cache_key"
    method. This method is about 9 times faster than the default "cache_key"
    method.
    
    The produced cache keys _are_ different from the previous ones but this
    is worth the performance improvement. To showcase this I set up a
    benchmark (using benchmark-ips) that compares FasterCacheKeys#cache_key
    with the regular cache_key. The output of this benchmark was:
    
        Calculating -------------------------------------
                   cache_key     4.825k i/100ms
              cache_key_fast    21.723k i/100ms
        -------------------------------------------------
                   cache_key     59.422k (± 7.2%) i/s -    299.150k
              cache_key_fast    543.243k (± 9.2%) i/s -      2.694M
    
        Comparison:
              cache_key_fast:   543243.4 i/s
                   cache_key:    59422.0 i/s - 9.14x slower
    
    To see the impact on real code I applied these changes and benchmarked
    Issue#referenced_merge_requests. For an issue referencing 10 merge
    requests these changes shaved off between 40 and 60 milliseconds.
    8ee5c3177e6d