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function run_test(isolated) {
let resolution = 100;
if (isolated) {
resolution = 5;
}
test(function() {
function check_resolutions(times, length) {
const end = length - 2;
// we compare each value with the following ones
for (let i = 0; i < end; i++) {
const h1 = times[i];
for (let j = i+1; j < end; j++) {
const h2 = times[j];
const diff = h2 - h1;
assert_true((diff === 0) || ((diff * 1000) >= resolution),
"Differences smaller than ' + resolution + ' microseconds: " + diff);
}
}
return true;
}
const times = new Array(10);
let index = 0;
let hrt1, hrt2, hrt;
assert_equals(self.crossOriginIsolated, isolated, "Document cross-origin isolated value matches");
// rapid firing of performance.now
hrt1 = performance.now();
hrt2 = performance.now();
times[index++] = hrt1;
times[index++] = hrt2;
// ensure that we get performance.now() to return a different value
do {
hrt = performance.now();
times[index++] = hrt;
} while ((hrt - hrt1) === 0);
assert_true(check_resolutions(times, index), 'Difference should be at least ' + resolution + ' microseconds.');
}, 'The recommended minimum resolution of the Performance interface has been set to ' + resolution + ' microseconds for cross-origin isolated contexts.');
}
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