change to hashbrown crate

[hitenkoku]

hayabusa-evtx/src/template_cache.rs

Line 11 in 158d496

use std::collections::HashMap;

でcollections::HashMapを利用していますが、処理的に問題なければhashbrown::HashMapを使うと高速化はしそう。

Originally posted by @hitenkoku in #2 (comment)