diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2859311..ce9a22c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ Bug Fixes:
 Improvements:
 
 - Add telemetry about how many users are hitting the dry-run warning and how many users are stopping the dry-run process due to it. [#565](https://github.com/microsoft/vscode-makefile-tools/pull/565)
+- Remove preprocessed regular expressions to reduce time. [#580](https://github.com/microsoft/vscode-makefile-tools/pull/580)
 
 ## 0.8
 Bug Fixes:
diff --git a/src/parser.ts b/src/parser.ts
index 7a74db5..cc5fa87 100644
--- a/src/parser.ts
+++ b/src/parser.ts
@@ -226,11 +226,12 @@ export async function preprocessDryRunOutput(
   // about them anyway and also there will be a correspondent line in the dryrun with these variables expanded.
   // Don't remove lines with $ without paranthesis, there are valid compilation lines that would be ignored otherwise.
   preprocessTasks.push(function (): void {
-    regexp = /.*\$\(.*/gm;
-    preprocessedDryRunOutputStr = preprocessedDryRunOutputStr.replace(
-      regexp,
-      ""
-    );
+    preprocessedDryRunOutputStr = preprocessedDryRunOutputStr
+      .split("\n")
+      .map((e) => {
+        return e.indexOf("$(") >= 0 ? "" : e;
+      })
+      .join("\n");
   });
 
   // Extract the link command