[erlang-questions] Speeding up text file I/O
Florian Weimer
fw@REDACTED
Mon Jan 7 14:30:10 CET 2008
Is there a way to read lines from a text files more quickly than the
excerpt below? This runs over 100 times slower than a "wc -l":
$ erlc wc.erl
$ erl -noshell -s wc process data -s erlang halt
I'm using erlang 1:11.b.5dfsg-12 (Debian) in this experiment.
-module(wc).
-export([process/1]).
processLines(File, Count) ->
case io:get_line(File, '') of
eof ->
io:format("~w~n", [Count]);
_ ->
processLines(File, Count + 1)
end.
process(Name) ->
{ok, S} = file:open(Name, [read]),
% ok = io:setopts(S, [binary]),
processLines(S, 0).
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