diff --git a/benchmark/url/whatwg-url-idna.js b/benchmark/url/whatwg-url-idna.js
index 41b4c639de97b6..3d0ea3dc8fe516 100644
--- a/benchmark/url/whatwg-url-idna.js
+++ b/benchmark/url/whatwg-url-idna.js
@@ -37,8 +37,6 @@ function main(conf) {
   const input = inputs[conf.input][to];
   const method = to === 'ascii' ? domainToASCII : domainToUnicode;
 
-  common.v8ForceOptimization(method, input);
-
   bench.start();
   for (var i = 0; i < n; i++) {
     method(input);
diff --git a/benchmark/vm/run-in-context.js b/benchmark/vm/run-in-context.js
index 62ebe29146e705..d1d4b5a7abbf20 100644
--- a/benchmark/vm/run-in-context.js
+++ b/benchmark/vm/run-in-context.js
@@ -23,8 +23,6 @@ function main(conf) {
 
   const contextifiedSandbox = vm.createContext();
 
-  common.v8ForceOptimization(vm.runInContext,
-                             '0', contextifiedSandbox, options);
   bench.start();
   for (; i < n; i++)
     vm.runInContext('0', contextifiedSandbox, options);
diff --git a/benchmark/vm/run-in-this-context.js b/benchmark/vm/run-in-this-context.js
index f66fd31a1a949e..f3a7e969287d50 100644
--- a/benchmark/vm/run-in-this-context.js
+++ b/benchmark/vm/run-in-this-context.js
@@ -21,7 +21,6 @@ function main(conf) {
 
   var i = 0;
 
-  common.v8ForceOptimization(vm.runInThisContext, '0', options);
   bench.start();
   for (; i < n; i++)
     vm.runInThisContext('0', options);