Commits on Sep 30, 2021

1. Use faster any_hash logic in rb_hash …

   From the documentation of rb_obj_hash:
   
   > Certain core classes such as Integer use built-in hash calculations and
   > do not call the #hash method when used as a hash key.
   
   So if you override, say, Integer#hash it won't be used from rb_hash_aref
   and similar. This avoids method lookups in many common cases.
   
   This commit uses the same optimization in rb_hash, a method used
   internally and in the C API to get the hash value of an object. Usually
   this is used to build the hash of an object based on its elements.
   Previously it would always do a method lookup for 'hash'.
   
   This is primarily intended to speed up hashing of Arrays and Hashes,
   which call rb_hash for each element.
   
       compare-ruby: ruby 3.0.1p64 (2021-04-05 revision 0fb782e) [x86_64-linux]
       built-ruby: ruby 3.1.0dev (2021-09-29T02:13:24Z fast_hash d670bf88b2) [x86_64-linux]
       # Iteration per second (i/s)
   
       |                 |compare-ruby|built-ruby|
       |:----------------|-----------:|---------:|
       |hash_aref_array  |       1.008|     1.769|
       |                 |           -|     1.76x|

   

   jhawthorn committed Sep 30, 2021
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