load.c: reduce memory usage of loaded_features_index

Use integer hashsum instead of string as a key in loaded_features_index.
Do not use ruby strings for substring operation, just plain pointer
and length.

[ruby-core:53688]

Co-authored-by: Sokolov Yura aka funny_falcon <funny.falcon@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62404 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

0 files changed, 0 insertions, 0 deletions