[js-perf-tests] Bring basic-import and basic-export in line with basic-namespace

All microbenchmarks now add 20 variables together per iteration, rather than
just a single variable.

Also re-add a sanity check after the loop, and fix a missing variable add (a15)
from the loop.

Bug: v8:1569
Change-Id: Ie54357b5cedaafd85f01c699c08b24a5ee6468c9
Reviewed-on: https://chromium-review.googlesource.com/636284Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47618}

test/js-perf-test/Modules/basic-export.js

@@ -3,5 +3,54 @@
 // found in the LICENSE file.
 
 export let value = 0;
-for (let i = 0; i < iterations; ++i) ++value;
-if (value != iterations) throw value;
+export function set(x) { value = x };
+
+export let a0 = 0;
+export let a1 = 1;
+export let a2 = 2;
+export let a3 = 3;
+export let a4 = 4;
+export let a5 = 5;
+export let a6 = 6;
+export let a7 = 7;
+export let a8 = 8;
+export let a9 = 9;
+export let a10 = 10;
+export let a11 = 11;
+export let a12 = 12;
+export let a13 = 13;
+export let a14 = 14;
+export let a15 = 15;
+export let a16 = 16;
+export let a17 = 17;
+export let a18 = 18;
+export let a19 = 19;
+
+for (let i = 0; i < iterations; ++i) {
+  let accumulator = value;
+  accumulator += a0;
+  accumulator += a1;
+  accumulator += a2;
+  accumulator += a3;
+  accumulator += a4;
+  accumulator += a5;
+  accumulator += a6;
+  accumulator += a7;
+  accumulator += a8;
+  accumulator += a9;
+  accumulator += a10;
+  accumulator += a11;
+  accumulator += a12;
+  accumulator += a13;
+  accumulator += a14;
+  accumulator += a15;
+  accumulator += a16;
+  accumulator += a17;
+  accumulator += a18;
+  accumulator += a19;
+  set(accumulator);
+}
+
+if (value !== 190 * iterations) throw new Error;
+
+set(0);

test/js-perf-test/Modules/basic-import.js

@@ -2,7 +2,54 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import {value, set} from "value.js";
-for (let i = 0; i < iterations; ++i) set(value + 1);
-if (value != iterations) throw value;
+import { value,
+         set,
+         a0,
+         a1,
+         a2,
+         a3,
+         a4,
+         a5,
+         a6,
+         a7,
+         a8,
+         a9,
+         a10,
+         a11,
+         a12,
+         a13,
+         a14,
+         a15,
+         a16,
+         a17,
+         a18,
+         a19 } from "value.js";
+
+for (let i = 0; i < iterations; ++i) {
+  let accumulator = value;
+  accumulator += a0;
+  accumulator += a1;
+  accumulator += a2;
+  accumulator += a3;
+  accumulator += a4;
+  accumulator += a5;
+  accumulator += a6;
+  accumulator += a7;
+  accumulator += a8;
+  accumulator += a9;
+  accumulator += a10;
+  accumulator += a11;
+  accumulator += a12;
+  accumulator += a13;
+  accumulator += a14;
+  accumulator += a15;
+  accumulator += a16;
+  accumulator += a17;
+  accumulator += a18;
+  accumulator += a19;
+  set(accumulator);
+}
+
+if (value !== 190 * iterations) throw new Error;
+
 set(0);

test/js-perf-test/Modules/basic-namespace.js

@@ -20,10 +20,14 @@ for (let i = 0; i < iterations; ++i) {
   accumulator += m.a12;
   accumulator += m.a13;
   accumulator += m.a14;
+  accumulator += m.a15;
   accumulator += m.a16;
   accumulator += m.a17;
   accumulator += m.a18;
   accumulator += m.a19;
   m.set(accumulator);
 }
+
+if (m.value !== 190 * iterations) throw new Error;
+
 m.set(0);