core: use memchr for trunc_key_at0

Cargo.lock

@@ -157,6 +157,12 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f051f77a7c8e6957c0696eac88f26b0117e54f52d3fc682ab19397a8812846a4"
 
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
 [[package]]
 name = "memmap2"
 version = "0.5.8"
@@ -426,6 +432,7 @@ name = "yglnk-core"
 version = "0.0.1"
 dependencies = [
  "int-enum",
+ "memchr",
  "xxhash-rust",
 ]
 

crates/yglnk-core/Cargo.toml

@@ -12,6 +12,10 @@ license = "Apache-2.0 OR ISC"
 version = "0.5"
 default-features = false
 
+[dependencies.memchr]
+version = "2.5"
+default-features = false
+
 [dependencies.xxhash-rust]
 version = "0.8"
 features = ["xxh64"]

crates/yglnk-core/src/hash_table.rs

@@ -158,7 +158,7 @@ impl<'a> Ref<'a> {
             }
         }
 
-        return None;
+        None
     }
 
     pub fn iter(&self) -> Iter<'a> {

crates/yglnk-core/src/lib.rs

@@ -74,8 +74,9 @@ pub enum Ntt01 {
 }
 
 pub fn trunc_key_at0(key: &[u8]) -> &[u8] {
-    let key_end = key.iter().take_while(|&&i| i != 0).count();
-    &key[..key_end]
+    memchr::memchr(0, key)
+        .map(|key_end| &key[..key_end])
+        .unwrap_or(key)
 }
 
 pub fn decode_location(location: u32) -> Option<usize> {