close $w or die "failed to close: $!";
# F_SETPIPE_SZ = 1031 on Linux; increasing the pipe size here
# speeds V2Writable batch imports across 8 cores by nearly 20%
fcntl($r, 1031, 1048576) if $^O eq 'linux';
close $w or die "failed to close: $!";
# F_SETPIPE_SZ = 1031 on Linux; increasing the pipe size here
# speeds V2Writable batch imports across 8 cores by nearly 20%
fcntl($r, 1031, 1048576) if $^O eq 'linux';