Hyper: Executing "yes" freezes the console

[Bertg]

Reproduce:

• open hyperterm
• type "yes"
• hit enter

Expectation:

• Window should scroll
• ctrl-c should interrupt the process

[MrRio]

Can confirm on latest master

[diessica]

Also happening on OS X El Capitan 10.11.

Latest master.

[ssdong]

This is really an interesting bug I would say. lol

[albinekb]

I think this is related to #94

[k1sul1]

Just happened to me, again..

Everything just freezes in the app, and this is rather interesting:

This is pretty serious bug as it crashes the whole terminal, which could be pretty catastrophic if you have a lot going on in other tabs.

[whitfin]

I think it's due to Hyper being slow with IO in general. If you print anything "large", it freezes and doesn't accept input until it has cleared the buffer - not just yes. It just happens that with yes it can't clear the buffer, so it just freezes for good. If you write a script to output something a large number of times, it'll also freeze, but will recover once the buffer has flushed.

Not unrelated, this has been very frustrating when working on Advent of Code :)

[lyndsysimon]

Still an issue in 1.2.1.

I agree with @zaxkehh, it's a problem with IO in general. I was able to reproduce with the following zsh script:

for i in {1..50000}
do
    echo $i;
done;
sleep 5;
for i in {1..10}
do
    echo $i;
    sleep 1;
done;

This produces 50k lines of output (which chokes Hyper, and drives CPU usage through the roof), waits 5 seconds, then outputs an additional 10 lines one at a rate of one per second. By the time Hyper catches up the output is complete.

[lyndsysimon]

This issue is of critical importance to me, because I often run several processes at once that output a debug log during development and testing. This makes Hyper almost unusable for me.

[1Reinier]

Why is Hyper's I/O so slow?

[chabou]

It depends on which version you tried ;)

[rolurq]

This is still happening to me in the latest stable version 3.0.2
Not only with yes but with any program with a lot of output as well.