perl6/rakudo: Does perl6 enable "autoflush" by default?

Question

#!perl6
use v6;

my $message = "\nHello!\n\nSleep\nTest\n\n";

my @a = $message.split( '' );

for @a {
    sleep 0.3; 
    .print;
}

Does perl6 enable "autoflush" by default. With perl5 without enabling "outflush" I don't get this behavior.

Bard

It looks like the world has changed in the last six years. – Skewbald

Rakudo doesn't support autoflush. There's a note in 5to6-perlvar under the $OUTPUT_AUTOFLUSH entry. – Skewbald

What behavior? And note that unbuffered != autoflush ... No one who has asked or answered any of the SO questions about autoflush, nor the Rakudo folks, seems to grasp this. – Practitioner

Answer 1

Rakudo enables autoflush by default; the specification is silent about the default.

Sisk

Rakudo doesn't support autoflush. There's a note in 5to6-perlvar under the $OUTPUT_AUTOFLUSH entry. – Skewbald

Answer 2

Quoting from the docs regarding auto flush:

‘No global alternative available. TTY handles are unbuffered by default, for others, set out-buffer to zero or use :!out-buffer with open on a specific IO::Handle.’

So any printing to stdout is unbuffered and I guess would behave similar to auto flushed stdout of perl5.

Other handles depend on the out-buffer size set.

Amadis

unbuffered is not the same as autoflush. No one who has answered any of the SO questions about autoflush, nor the Rakudo folks, seems to grasp this. – Practitioner