Cache the blobs generated by scripts

src/utils/BlobCache.ts

@@ -0,0 +1,18 @@
+
+const blobCache: { [hash: string]: string } = {};
+
+export class BlobCache {
+  static get(hash: string) {
+    return blobCache[hash];
+  }
+
+  static store(hash: string, value: string): void {
+    if (blobCache[hash]) return;
+    blobCache[hash] = value;
+  }
+
+  static removeByValue(value: string) {
+    const keys = Object.keys(blobCache).filter((key) => blobCache[key] === value);
+    keys.forEach((key) => delete blobCache[key]);
+  }
+}