feat(core): Deno.core.heapStats() (#9659)

This commit implements "Deno.core.heapStats()" function 
that allows to programatically measure isolate heap-usage.

1 files changed, 3 insertions, 0 deletions

diff --git a/core/lib.deno_core.d.ts b/core/lib.deno_core.d.ts
index 1efb92dc6..004ed0529 100644
--- a/core/lib.deno_core.d.ts
+++ b/core/lib.deno_core.d.ts
@@ -35,5 +35,8 @@ declare namespace Deno {
 
     /** Close the resource with the specified op id. */
     function close(rid: number): void;
+
+    /** Get heap stats for current isolate/worker */
+    function heapStats(): Record<string, number>;
   }
 }