On 2/23/12 3:40 PM, Martin Nowak wrote:
On my machine (Mac OSX Lion), the Python code clocks around 1.2
seconds and the D code at a whopping 9.3 seconds. I looked around
where the problem lies and sure enough the issue was with a slow loop
in the generic I/O implementation of readln. The commit
https://github.com/D-Programming-Language/phobos/commit/94b21d38d16e075d7c44b53015eb1113854424d0
brings the speed of the test to 2.1 seconds. We could and should
reduce that further with taking buffering in our own hands, but for
now this is a good low-hanging fruit to pick.
Nice, I just got shocked yesterday by seeing that we call fgetc for
every char,
those are usually macros and as we already maintain the per system
*_unlocked
functions we might probably use the macro expansions.
Yah, feel free to work opportunistically on this if you find the time.
However, I think long-term we want to give byLine() the freedom of doing
its own buffering.
Andrei
