fixes

Author: camillobruni

JetStreamDriver.js

@@ -30,8 +30,13 @@ const measureTotalTimeAsSubtest = false; // Once we move to preloading all resou
 const defaultIterationCount = 120;
 const defaultWorstCaseCount = 4;
 
-if (!JetStreamParams.prefetchResources && isInBrowser)
+if (!JetStreamParams.prefetchResources && isInBrowser) {
     console.warn("Disabling resource prefetching! All compressed files must have been decompressed using `npm run decompress`");
+}
+
+if (JetStreamParams.forceGC && typeof globalThis.gc === "undefined") {
+    console.warn("Force-gc is set, but globalThis.gc() is not available.");
+}
 
 if (!isInBrowser && JetStreamParams.prefetchResources) {
     // Use the wasm compiled zlib as a polyfill when decompression stream is
@@ -982,6 +987,9 @@ class Benchmark {
             magicFrame.contentDocument.close();
         else if (isD8)
             Realm.dispose(magicFrame);
+
+        if (JetStreamParams.forceGC)
+            globalThis?.gc();
     }
 
     async doLoadBlob(resource) {

cli.js

@@ -81,6 +81,10 @@ const CLI_PARAMS = {
     help: "Custom code to run after each iteration.",
     param: "customPostIterationCode",
   },
+  "force-gc": {
+    help: "Force garbage collection after each benchmark run, requires engine support.",
+    param: "forceGC",
+  },
 };
 
 const cliParams = new Map();

utils/params.js

@@ -43,6 +43,7 @@ class Params {
     groupDetails = false
 
     RAMification = false;
+    forceGC = false;
     dumpJSONResults = false;
     dumpTestList = false;
     // Override iteration and worst-case counts per workload.
@@ -70,6 +71,7 @@ class Params {
         this.dumpJSONResults = this._parseBooleanParam(sourceParams, "dumpJSONResults");
         this.groupDetails = this._parseBooleanParam(sourceParams, "groupDetails");
         this.dumpTestList = this._parseBooleanParam(sourceParams, "dumpTestList");
+        this.forceGC = this._parseBooleanParam(sourceParams, "forceGC");
 
         this.customPreIterationCode = this._parseStringParam(sourceParams, "customPreIterationCode");
         this.customPostIterationCode = this._parseStringParam(sourceParams, "customPostIterationCode");