From 7b9797648ac2bec11a9d03837cd46ff0e44e936a Mon Sep 17 00:00:00 2001
From: Oliver Booth <me@olivr.me>
Date: Tue, 28 Mar 2023 15:44:27 +0100
Subject: [PATCH] perf(sourcegen): cache and compile regex. pass timeout

---
 X10D.SourceGenerator/EmojiRegexGenerator.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/X10D.SourceGenerator/EmojiRegexGenerator.cs b/X10D.SourceGenerator/EmojiRegexGenerator.cs
index 9b44b2f..2d67b1d 100644
--- a/X10D.SourceGenerator/EmojiRegexGenerator.cs
+++ b/X10D.SourceGenerator/EmojiRegexGenerator.cs
@@ -17,6 +17,7 @@ internal sealed class EmojiRegexGenerator : ISourceGenerator
     public void Initialize(GeneratorInitializationContext context)
     {
         string response = HttpClient.GetStringAsync(TwemojiRegexUrl).GetAwaiter().GetResult();
+        var regex = new Regex(@"export default /(?<regex>.+)/g;", RegexOptions.Compiled, Regex.InfiniteMatchTimeout);
         using var reader = new StringReader(response);
 
         while (reader.ReadLine() is { } line)
@@ -26,7 +27,7 @@ internal sealed class EmojiRegexGenerator : ISourceGenerator
                 continue;
             }
 
-            Match match = Regex.Match(line, @"export default /(?<regex>.+)/g;");
+            Match match = regex.Match(line);
             if (!match.Success)
             {
                 continue;