diff --git a/benchmark/buffers/buffer-compare-instance-method.js b/benchmark/buffers/buffer-compare-instance-method.js
index bb07326f3de218..ff3bc4c1abda98 100644
--- a/benchmark/buffers/buffer-compare-instance-method.js
+++ b/benchmark/buffers/buffer-compare-instance-method.js
@@ -1,6 +1,5 @@
 'use strict';
 const common = require('../common.js');
-const v8 = require('v8');
 
 const bench = common.createBenchmark(main, {
   size: [16, 512, 1024, 4096, 16386],
@@ -20,7 +19,6 @@ function main(conf) {
 
   b1[size - 1] = 'b'.charCodeAt(0);
 
-  // Force optimization before starting the benchmark
   switch (args) {
     case 2:
       b0.compare(b1, 0);
@@ -37,8 +35,6 @@ function main(conf) {
     default:
       b0.compare(b1);
   }
-  v8.setFlagsFromString('--allow_natives_syntax');
-  eval('%OptimizeFunctionOnNextCall(b0.compare)');
   switch (args) {
     case 2:
       b0.compare(b1, 0);
diff --git a/benchmark/buffers/buffer-compare-offset.js b/benchmark/buffers/buffer-compare-offset.js
index 17b36f82883426..fd8c96dbce0158 100644
--- a/benchmark/buffers/buffer-compare-offset.js
+++ b/benchmark/buffers/buffer-compare-offset.js
@@ -1,6 +1,5 @@
 'use strict';
 const common = require('../common.js');
-const v8 = require('v8');
 
 const bench = common.createBenchmark(main, {
   method: ['offset', 'slice'],
@@ -9,18 +8,6 @@ const bench = common.createBenchmark(main, {
 });
 
 function compareUsingSlice(b0, b1, len, iter) {
-
-  // Force optimization before starting the benchmark
-  Buffer.compare(b0.slice(1, len), b1.slice(1, len));
-  v8.setFlagsFromString('--allow_natives_syntax');
-  eval('%OptimizeFunctionOnNextCall(Buffer.compare)');
-  eval('%OptimizeFunctionOnNextCall(b0.slice)');
-  eval('%OptimizeFunctionOnNextCall(b1.slice)');
-  Buffer.compare(b0.slice(1, len), b1.slice(1, len));
-  doCompareUsingSlice(b0, b1, len, iter);
-}
-
-function doCompareUsingSlice(b0, b1, len, iter) {
   var i;
   bench.start();
   for (i = 0; i < iter; i++)
@@ -29,16 +16,6 @@ function doCompareUsingSlice(b0, b1, len, iter) {
 }
 
 function compareUsingOffset(b0, b1, len, iter) {
-  len = len + 1;
-  // Force optimization before starting the benchmark
-  b0.compare(b1, 1, len, 1, len);
-  v8.setFlagsFromString('--allow_natives_syntax');
-  eval('%OptimizeFunctionOnNextCall(b0.compare)');
-  b0.compare(b1, 1, len, 1, len);
-  doCompareUsingOffset(b0, b1, len, iter);
-}
-
-function doCompareUsingOffset(b0, b1, len, iter) {
   var i;
   bench.start();
   for (i = 0; i < iter; i++)
diff --git a/benchmark/buffers/buffer-swap.js b/benchmark/buffers/buffer-swap.js
index c6d7db470bc69a..71e08890910843 100644
--- a/benchmark/buffers/buffer-swap.js
+++ b/benchmark/buffers/buffer-swap.js
@@ -1,7 +1,6 @@
 'use strict';
 
 const common = require('../common.js');
-const v8 = require('v8');
 
 const bench = common.createBenchmark(main, {
   aligned: ['true', 'false'],
@@ -81,9 +80,7 @@ function main(conf) {
   const buf = createBuffer(len, aligned === 'true');
   const bufferSwap = genMethod(method);
 
-  v8.setFlagsFromString('--allow_natives_syntax');
-  eval('%OptimizeFunctionOnNextCall(bufferSwap)');
-
+  bufferSwap(n, buf);
   bench.start();
   bufferSwap(n, buf);
   bench.end(n);