perf: optimise with constant time fn

Signed-off-by: bwty <[email protected]>

crates/interledger-packet/src/packet.rs

@@ -129,6 +129,9 @@ impl TryFrom<BytesMut> for Prepare {
     type Error = ParseError;
 
     fn try_from(buffer: BytesMut) -> Result<Self, Self::Error> {
+        use once_cell::sync::OnceCell;
+        use regex::bytes::Regex;
+
         let (content_offset, mut content) = deserialize_envelope(PacketType::Prepare, &buffer)?;
         let content_len = content.len();
         let amount = content.read_u64::<BigEndian>()?;
@@ -138,7 +141,11 @@ impl TryFrom<BytesMut> for Prepare {
         let mut expires_at = [0x00; 17];
         content.read_exact(&mut expires_at)?;
 
-        if !expires_at.iter().all(|e| (b'0'..=b'9').contains(e)) {
+        if !expires_at
+            .iter()
+            .map(|e| (b'0'..=b'9').contains(e))
+            .fold(true, |a, b| a & b)
+        {
             return Err(ParseError::InvalidPacket("DateTime must be numeric".into()));
         }