Zero-copy principals + CompactString partial impl

crates/utils/Cargo.toml

@@ -38,6 +38,7 @@ downcast-rs = "2.0.1"
 fast-float = "0.2.0"
 erased-serde = "0.4.5"
 rkyv = { version = "0.8.10", features = ["little_endian"] }
+compact_str = "0.9.0"
 
 [target.'cfg(unix)'.dependencies]
 privdrop = "0.5.3"

crates/utils/src/config/utils.rs

@@ -11,6 +11,7 @@ use std::{
     time::Duration,
 };
 
+use compact_str::CompactString;
 use mail_auth::{
     IpLookupStrategy,
     common::crypto::{Algorithm, HashAlgorithm},
@@ -638,6 +639,26 @@ impl AsKey for &str {
     }
 }
 
+impl AsKey for CompactString {
+    fn as_key(&self) -> String {
+        self.to_string()
+    }
+
+    fn as_prefix(&self) -> String {
+        format!("{self}.")
+    }
+}
+
+impl AsKey for &CompactString {
+    fn as_key(&self) -> String {
+        self.to_string()
+    }
+
+    fn as_prefix(&self) -> String {
+        format!("{self}.")
+    }
+}
+
 impl AsKey for String {
     fn as_key(&self) -> String {
         self.to_string()

crates/utils/src/lib.rs

@@ -17,6 +17,7 @@ pub mod snowflake;
 pub mod topological;
 pub mod url_params;
 
+use compact_str::CompactString;
 use futures::StreamExt;
 use reqwest::Response;
 use rustls::{
@@ -364,8 +365,8 @@ impl ServerCertVerifier for DummyVerifier {
 }
 
 // Basic email sanitizer
-pub fn sanitize_email(email: &str) -> Option<String> {
-    let mut result = String::with_capacity(email.len());
+pub fn sanitize_email(email: &str) -> Option<CompactString> {
+    let mut result = CompactString::with_capacity(email.len());
     let mut found_local = false;
     let mut found_domain = false;
     let mut last_ch = char::from(0);