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array-test.ts
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array-test.ts
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const a: number[] = [];
function time(fn: () => void): number {
const now = Date.now();
fn();
return Date.now() - now;
}
function unshift(number: number) {
for (let i = 0; i < number; ++i) {
a.unshift(Math.random());
}
}
function shift(number: number) {
for (let i = 0; i < number; ++i) {
a.shift();
}
}
function push(number: number) {
for (let i = 0; i < number; ++i) {
a.push(Math.random());
}
}
function pop(number: number) {
for (let i = 0; i < number; ++i) {
a.pop();
}
}
function get(idx: number) {
return function() {
return a[idx];
};
}
function push_arr(count: number) {
return function() {
push(count);
};
}
function pop_arr(count: number) {
return function() {
pop(count);
};
}
function unshift_arr(count: number) {
return function() {
unshift(count);
};
}
function shift_arr(count: number) {
return function() {
shift(count);
};
}
const tests = [10, 100, 1000, 10000, 100000, 1_000_000, 10_000_000];
console.log("Testing get");
tests.forEach(t => {
a.length = 0;
push(t);
console.log(t, time(get(t - 1)));
});
console.log("push");
tests.forEach(t => {
a.length = 0;
push(t);
console.log(t, time(push_arr(1000)));
});
console.log("pop");
tests.forEach(t => {
a.length = 0;
push(t);
console.log(t, time(pop_arr(1000)));
});
console.log("unshift");
tests.forEach(t => {
a.length = 0;
push(t);
console.log(t, time(unshift_arr(1000)));
});
console.log("shift");
tests.forEach(t => {
a.length = 0;
push(t);
console.log(t, time(shift_arr(1000)));
});