benchmark: calibrate test runner benchmarks

Use calibrated n values for the test runner mock-timers and
test-only benchmarks.

Reduce the test options benchmark configurations to keep the
benchmark suite smaller.

Signed-off-by: Luan Muniz <luan@luanmuniz.com.br>

Author: luanmuniz

benchmark/test_runner/mock-timers.js

@@ -6,7 +6,7 @@ const { test } = require('node:test');
 const nodeTimersPromises = require('node:timers/promises');
 
 const bench = common.createBenchmark(main, {
-  n: [1, 10, 100, 1000],
+  n: [1000],
   mode: [
     'enable-empty-apis',
     'enable-setTimeout',

benchmark/test_runner/test-only.js

@@ -6,7 +6,7 @@ const reporter = require('../fixtures/empty-test-reporter');
 const { test } = require('node:test');
 
 const bench = common.createBenchmark(main, {
-  n: [1, 10, 100, 1000],
+  n: [10000],
   selected: [1],
 }, {
   // We don't want to test the reporter here.