The speed is too slow for filling into database

I write a program and ran it couple times to test the speed. I filled 60 number to a collection, the time for that is 10 to 15 seconds. That is too slow, are there any way to speed up?
my program is:
let i=0;
$w.onReady( function () {
});

export function button1_click(event) {
asyncloop();
}

async function asyncloop() {
for ( var k = 0; k < 10; k++) {
const j = 6;
for ( i = 0; i < j; i++) {
await getIndex(i);
await mySave(i);
$w(“#text1”).text= i.toString();
}
}
$w(‘#text1’).text =“finished”;
}

function getIndex (x) {
return $w(“#dataset1”).setCurrentItemIndex(x)
.then( () => {
} );
}

function mySave (x) {
$w(“#dataset1”).setFieldValue(“timeOffset”, x);
return $w(“#dataset1”).save()
.then( (item) => {
} );
}