calling a function is slow & rtc cant detect correct time intervals

[madmagic007]

minimal code example:

function func() {
    for (let i = 0; i < 8192; i++) {
        test();
    }
    console.log("after");
}

function test() {}

setInterval(func, 0);

I tried on both pico and pico w boards, the "after" only gets printed like 5 times per seconds in the console. if i remove or comment out the test();, then it's as fast as the console can handle prints it seems. so its not the looping, its the calling a function inside a loop that seems to be very slow. if i define the func inside the setInterval or not, its the same result.

i tried using all version for both boards, same result.

Plus, using the RTC (or any timing library), seems to be only able to to detect 1000ms delays? eg if i put rtc.getTime(); before and after the for loop and compare them, its either 0 or 1000, nothing in between.

[communix]

@madmagic007 Sorry, Yes it's slower than C code but I don't think I can make it faster. It's the java script engine and rp2040 performance issue.

The RTC is very slow clock so you can't detect ms delay. Kaluma use the default RTC timer in RP2040 and it's 1Hz clock. So you can't use RTC to detect fast timing (less than 1sec). Instead of the RTC, Kaluma provide millis() and micros() function. please find the details in below link https://kalumajs.org/docs/api/timers

[communix]

Close this issue. Please re-open it if anyone has question about this topic.