optimization: use fxhash

Author: koraa

Cargo.lock

@@ -13,4 +13,4 @@ keywords = ["cli", "uniq"]
 [dependencies]
 clap = "^2.33.0"
 anyhow = "1.0"
-ahash = "0.2.18"
+fxhash = "^0.2.1"

Cargo.toml

@@ -1,11 +1,10 @@
 extern crate clap;
-extern crate ahash;
 
 use std::collections::{HashSet, HashMap, hash_map};
 use std::hash::{Hasher, BuildHasher};
 use std::io::{stdin, BufRead, BufReader, stdout, Write, BufWriter};
 use std::slice;
-use ahash::ABuildHasher;
+use fxhash::FxBuildHasher;
 use clap::{Arg, App};
 use anyhow::Result;
 
@@ -67,7 +66,7 @@ fn uniq_cmd(delim: u8) -> Result<()> {
     let inp = stdin();
     let mut out = BufWriter::new(out.lock());
     let mut inp = BufReader::new(inp.lock());
-    let hasher = ABuildHasher::new();
+    let hasher = FxBuildHasher::default();
     let mut set = HashSet::<u64, BuildIdentityHasher>::default();
     let mut line = Vec::<u8>::new();
     while inp.read_until(delim, &mut line)? > 0 {