occaecatidicta/packages/omelox-protobuf/test/stringBufferTest.ts

function joinTest(num: number) {

    let arr: string[] = [];
    for (let i = 0; i < num; i++)
        arr.push(i + '');

    let start = Date.now();
    let str = '';

    for (let i = 0; i < num; i++) {
        str += arr[i];
    }

    let end = Date.now();
    let time1 = end - start;

    start = Date.now();
    arr = [];
    for (let i = 0; i < num; i++) {
        arr.push(arr[i]);
    }
    let str1 = arr.join();
    end = Date.now();
    let time2 = end - start;

    console.log('test count : %j, \ncost 1 : %j, \ncost 2 : %j', num, time1, time2);
}

it('test stringbuffer', () => {
    joinTest(100);
    joinTest(50000);
    joinTest(100000);
    joinTest(200000);
});
// joinTest(500000);