From 7b784859d09d0e3e875b03a03bec16a9555aa27c Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Sat, 9 May 2026 02:47:32 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=20Bolt:=20Cache=20regex=20to=20preven?=
 =?UTF-8?q?t=20recompilation=20on=20every=20extract=20call?=
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Extracts the `\s+` regex allocation from within the `HintExtractor.extract` method to a static `WHITESPACE` property to eliminate recompilation overhead on each invocation.

Co-authored-by: himattm <6266621+himattm@users.noreply.github.com>
---
 .../src/commonMain/kotlin/halogen/engine/HintExtractor.kt  | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/halogen-engine/src/commonMain/kotlin/halogen/engine/HintExtractor.kt b/halogen-engine/src/commonMain/kotlin/halogen/engine/HintExtractor.kt
index c5cb8cb..d18248b 100644
--- a/halogen-engine/src/commonMain/kotlin/halogen/engine/HintExtractor.kt
+++ b/halogen-engine/src/commonMain/kotlin/halogen/engine/HintExtractor.kt
@@ -15,6 +15,11 @@ internal object HintExtractor {
     private val ID_PATTERN = Regex("""^[0-9a-f]{8,}$""", RegexOption.IGNORE_CASE)
     private val NUMERIC_ONLY = Regex("""^\d+$""")
 
+    // ⚡ Bolt: Cache regex to prevent recompilation on every extract call.
+    // Expected impact: Eliminates regex allocation/compilation overhead per extraction,
+    // saving memory and execution time in a hot path.
+    private val WHITESPACE = Regex("""\s+""")
+
     fun extract(key: String): String? {
         if (key.isBlank()) return null
 
@@ -36,7 +41,7 @@ internal object HintExtractor {
         cleaned = cleaned.replace('_', ' ').replace('-', ' ')
 
         // Normalize whitespace
-        cleaned = cleaned.trim().replace(Regex("""\s+"""), " ")
+        cleaned = cleaned.trim().replace(WHITESPACE, " ")
 
         if (cleaned.isBlank()) return null