setInterval setImmediate about goja_nodejs

[dop251]

It's not that simple, if you run this:

setTimeout(() => {
    console.log("timeout");
});

setImmediate(() => {
    console.log("immediate");
});

setTimeout(function() {
    setTimeout(function() {
        console.log('setTimeout')
    }, 0);
    setImmediate(function() {
        console.log('setImmediate')
    });
}, 10);

You'll consistently get

timeout
immediate
setImmediate
setTimeout

Quick research shows that there is no hard requirement on the ordering, for example this article says:

A setTimeout() callback with a 0ms delay is very similar to setImmediate(). The execution order will depend on various factors, but they will be both run in the next iteration of the event loop.

In any case, the node's implementation of event loop is quite complex, and it would be non-trivial to implement something that mimics it precisely. Having said that, I'm always open to consider PRs.

[cjf621]

It's not that simple, if you run this:

setTimeout(() => {
    console.log("timeout");
});

setImmediate(() => {
    console.log("immediate");
});

setTimeout(function() {
    setTimeout(function() {
        console.log('setTimeout')
    }, 0);
    setImmediate(function() {
        console.log('setImmediate')
    });
}, 10);

You'll consistently get

timeout
immediate
setImmediate
setTimeout

Quick research shows that there is no hard requirement on the ordering, for example this article says:

A setTimeout() callback with a 0ms delay is very similar to setImmediate(). The execution order will depend on various factors, but they will be both run in the next iteration of the event loop.

In any case, the node's implementation of event loop is quite complex, and it would be non-trivial to implement something that mimics it precisely. Having said that, I'm always open to consider PRs.

This example it is settimeout block，So it's expected output，but if i have many long time script is run，i can not use setImmediate or other api Insert Before Queue

[dop251]

As I said, PRs are welcome.