Lightweight implementation of Q.js for performance
Solves stack preservation when calling async functions without an await over async boundries
function testFn(){
const deferred = Q.defer()
async function a(){
await Q.delay(1)
throw new Error('test')
}
const promise = a()
// will fail if this becomes awaited
// this is because the stack is not preserved
await Q.delay(10)
const p = Q.cancelledRace([deferred.promise,promise])
deferred.resolve()
return await p
}
Stack would be lost (testFn) in this test over the Q.delay call. However with Q.safetyAwait method state can be preserved.
function testFn(){
const deferred = Q.defer()
async function a(){
await Q.delay(1)
throw new Error('test')
}
const promise = a()
// will fail if this becomes awaited
// this is because the stack is not preserved
await Q.safetyAwait([Q.delay(10)], [promise])
const p = Q.cancelledRace([deferred.promise,promise])
deferred.resolve()
return await p
}