Add ability to output compiler performance information (#6434)

1 files changed, 5 insertions, 0 deletions

diff --git a/cli/js/ts_global.d.ts b/cli/js/ts_global.d.ts
index bca602998..dcdf4a3e4 100644
--- a/cli/js/ts_global.d.ts
+++ b/cli/js/ts_global.d.ts
@@ -24,5 +24,10 @@ declare global {
     // there is a risk these could change in future versions of TypeScript
     export const libs: string[];
     export const libMap: Map<string, string>;
+    export const performance: {
+      enable(): void;
+      disable(): void;
+      getDuration(value: string): number;
+    };
   }
 }