diff --git a/benchmark/url/legacy-vs-whatwg-url-get-prop.js b/benchmark/url/legacy-vs-whatwg-url-get-prop.js
index 93603c258cf1f2..2cc3ab8c75e65c 100644
--- a/benchmark/url/legacy-vs-whatwg-url-get-prop.js
+++ b/benchmark/url/legacy-vs-whatwg-url-get-prop.js
@@ -74,7 +74,7 @@ function useWHATWG(n, input) {
 function main({ type, n, method }) {
   const input = inputs[type];
   if (!input) {
-    throw new Error('Unknown input type');
+    throw new Error(`Unknown input type "${type}"`);
   }
 
   var noDead;  // Avoid dead code elimination.
@@ -86,7 +86,7 @@ function main({ type, n, method }) {
       noDead = useWHATWG(n, input);
       break;
     default:
-      throw new Error('Unknown method');
+      throw new Error(`Unknown method "${method}"`);
   }
 
   assert.ok(noDead);
diff --git a/benchmark/url/legacy-vs-whatwg-url-parse.js b/benchmark/url/legacy-vs-whatwg-url-parse.js
index da42d5a189af47..2be55e17cc354b 100644
--- a/benchmark/url/legacy-vs-whatwg-url-parse.js
+++ b/benchmark/url/legacy-vs-whatwg-url-parse.js
@@ -34,7 +34,7 @@ function useWHATWG(n, input) {
 function main({ type, n, method }) {
   const input = inputs[type];
   if (!input) {
-    throw new Error('Unknown input type');
+    throw new Error(`Unknown input type "${type}"`);
   }
 
   var noDead;  // Avoid dead code elimination.
@@ -46,7 +46,7 @@ function main({ type, n, method }) {
       noDead = useWHATWG(n, input);
       break;
     default:
-      throw new Error('Unknown method');
+      throw new Error(`Unknown method ${method}`);
   }
 
   assert.ok(noDead);
diff --git a/benchmark/url/legacy-vs-whatwg-url-searchparams-parse.js b/benchmark/url/legacy-vs-whatwg-url-searchparams-parse.js
index 51953ec8707374..e915ceb54f917f 100644
--- a/benchmark/url/legacy-vs-whatwg-url-searchparams-parse.js
+++ b/benchmark/url/legacy-vs-whatwg-url-searchparams-parse.js
@@ -31,7 +31,7 @@ function useWHATWG(n, input) {
 function main({ type, n, method }) {
   const input = inputs[type];
   if (!input) {
-    throw new Error('Unknown input type');
+    throw new Error(`Unknown input type "${type}"`);
   }
 
   switch (method) {
@@ -42,6 +42,6 @@ function main({ type, n, method }) {
       useWHATWG(n, input);
       break;
     default:
-      throw new Error('Unknown method');
+      throw new Error(`Unknown method ${method}`);
   }
 }
diff --git a/benchmark/url/legacy-vs-whatwg-url-searchparams-serialize.js b/benchmark/url/legacy-vs-whatwg-url-searchparams-serialize.js
index 3490782a1bf421..8fe3e546f0780d 100644
--- a/benchmark/url/legacy-vs-whatwg-url-searchparams-serialize.js
+++ b/benchmark/url/legacy-vs-whatwg-url-searchparams-serialize.js
@@ -33,7 +33,7 @@ function useWHATWG(n, input, prop) {
 function main({ type, n, method }) {
   const input = inputs[type];
   if (!input) {
-    throw new Error('Unknown input type');
+    throw new Error(`Unknown input type "${type}"`);
   }
 
   switch (method) {
@@ -44,6 +44,6 @@ function main({ type, n, method }) {
       useWHATWG(n, input);
       break;
     default:
-      throw new Error('Unknown method');
+      throw new Error(`Unknown method ${method}`);
   }
 }
diff --git a/benchmark/url/legacy-vs-whatwg-url-serialize.js b/benchmark/url/legacy-vs-whatwg-url-serialize.js
index e92b941b5d57e5..017ec4328c590b 100644
--- a/benchmark/url/legacy-vs-whatwg-url-serialize.js
+++ b/benchmark/url/legacy-vs-whatwg-url-serialize.js
@@ -36,7 +36,7 @@ function useWHATWG(n, input, prop) {
 function main({ type, n, method }) {
   const input = inputs[type];
   if (!input) {
-    throw new Error('Unknown input type');
+    throw new Error(`Unknown input type "${type}"`);
   }
 
   var noDead;  // Avoid dead code elimination.
@@ -48,7 +48,7 @@ function main({ type, n, method }) {
       noDead = useWHATWG(n, input);
       break;
     default:
-      throw new Error('Unknown method');
+      throw new Error(`Unknown method ${method}`);
   }
 
   assert.ok(noDead);
diff --git a/benchmark/url/url-searchparams-iteration.js b/benchmark/url/url-searchparams-iteration.js
index 2b13992bdfcfc0..cae2ef5df61956 100644
--- a/benchmark/url/url-searchparams-iteration.js
+++ b/benchmark/url/url-searchparams-iteration.js
@@ -53,6 +53,6 @@ function main({ method, n }) {
       iterator(n);
       break;
     default:
-      throw new Error('Unknown method');
+      throw new Error(`Unknown method ${method}`);
   }
 }
diff --git a/benchmark/url/url-searchparams-read.js b/benchmark/url/url-searchparams-read.js
index 29235ee81e0e14..0cf66dabbc36dc 100644
--- a/benchmark/url/url-searchparams-read.js
+++ b/benchmark/url/url-searchparams-read.js
@@ -10,45 +10,14 @@ const bench = common.createBenchmark(main, {
 
 const str = 'one=single&two=first&three=first&two=2nd&three=2nd&three=3rd';
 
-function get(n, param) {
-  const params = new URLSearchParams(str);
-
-  bench.start();
-  for (var i = 0; i < n; i += 1)
-    params.get(param);
-  bench.end(n);
-}
-
-function getAll(n, param) {
-  const params = new URLSearchParams(str);
-
-  bench.start();
-  for (var i = 0; i < n; i += 1)
-    params.getAll(param);
-  bench.end(n);
-}
-
-function has(n, param) {
+function main({ method, param, n }) {
   const params = new URLSearchParams(str);
+  const fn = params[method];
+  if (!fn)
+    throw new Error(`Unknown method ${method}`);
 
   bench.start();
   for (var i = 0; i < n; i += 1)
-    params.has(param);
+    fn(param);
   bench.end(n);
 }
-
-function main({ method, param, n }) {
-  switch (method) {
-    case 'get':
-      get(n, param);
-      break;
-    case 'getAll':
-      getAll(n, param);
-      break;
-    case 'has':
-      has(n, param);
-      break;
-    default:
-      throw new Error('Unknown method');
-  }
-}
diff --git a/benchmark/url/url-searchparams-sort.js b/benchmark/url/url-searchparams-sort.js
index 524dacb6d52dc4..fe152bf823468f 100644
--- a/benchmark/url/url-searchparams-sort.js
+++ b/benchmark/url/url-searchparams-sort.js
@@ -37,9 +37,8 @@ function main({ type, n }) {
   const params = new URLSearchParams();
   const array = getParams(input);
 
-  var i;
   bench.start();
-  for (i = 0; i < n; i++) {
+  for (var i = 0; i < n; i++) {
     params[searchParams] = array.slice();
     params.sort();
   }