$| = 1; only affects STDOUT, not FILE. That accounts for the speed difference and the clobbering.

Add FILE->autoflush(1); after the open statement. (Don't forget to use use IO::Handle;) to bring print inline with syswrite.

In reply to Re: Is print faster than syswrite? by ikegami
in thread Is print faster than syswrite? by saurabh.hirani

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