split -> memchr

Cargo.toml

@@ -18,6 +18,7 @@ serde_json = "1"
 main_error = "0.1"
 paste = "1"
 logos = "0.12"
+memchr = "2.5.0"
 
 [dev-dependencies]
 criterion = "0.4"

src/lib.rs

@@ -1,3 +1,5 @@
+extern crate core;
+
 pub use crate::common::{SteamId3, SubjectData, SubjectError, SubjectId};
 use crate::event::GameEventError;
 pub use crate::module::EventHandler;

src/raw_event.rs

@@ -6,6 +6,7 @@ use logos::{Lexer, Logos};
 use nom::{IResult, Needed};
 use std::convert::{TryFrom, TryInto};
 use std::num::ParseIntError;
+use memchr::memchr;
 
 /// Event that has only been minimally parsed.
 /// that way we can decide if we're interested in handling the event before parsing further
@@ -113,7 +114,7 @@ pub fn against_subject_parser(input: &str) -> IResult<&str, RawSubject> {
 
 pub fn subject_parser(input: &str) -> Result<(&str, RawSubject)> {
     if let Some(input) = input.strip_prefix('"') {
-        let (player, input) = input.split_once('"').ok_or(Error::Incomplete)?;
+        let (player, input) = split_once(input, b'"', 1)?;
         if player.ends_with("e>") {
             Ok((input, RawSubject::Console))
         } else {
@@ -126,15 +127,20 @@ pub fn subject_parser(input: &str) -> Result<(&str, RawSubject)> {
         } else if &input[6..7] == "b" {
             Ok((&input[11..], RawSubject::Team(Team::Blue)))
         } else {
-            let (_, input) = input[7..].split_once('"').ok_or(Error::Incomplete)?;
+            let (_, input) = split_once(&input[7..], b'"', 1)?;
             Ok((input, RawSubject::Team(Team::Spectator)))
         }
     } else {
-        let (system, _) = input.split_once(' ').ok_or(Error::Incomplete)?;
-        Ok((&input[system.len()..], RawSubject::System(system)))
+        let (system, input) = split_once(input, b' ', 0)?;
+        Ok((input, RawSubject::System(system)))
     }
 }
 
+fn split_once(input: &str, delim: u8, offset: usize) -> Result<(&str, &str)> {
+    let end = memchr(delim, input.as_bytes()).ok_or(Error::Incomplete)?;
+    Ok((&input[..end], &input[(end + offset)..]))
+}
+
 #[derive(Copy, Clone, Debug, PartialEq, Logos)]
 pub enum RawEventType {
     #[token(r#"joined"#)]