Re^2: Multithreading a large file split to multiple files

[jeffenstein]

From the IO::Handle documentation:

# setvbuf is not available by default on Perls 5.8.0 and later.
use IO::Handle '_IOLBF';
$io->setvbuf($buffer_var, _IOLBF, 1024);

However, the PerlIO::buffersize module adds a PerlIO layer that can set the buffersize when opening a file:

open my $fh, '<:buffersize(65536)', $filename;