This may not be representative, but a simple test shows that regexp could be much much faster here:
use Benchmark ();
our @data;
my $line = '1.000000 '
. ' 100.273 121.54 98.169 121.58'
. ' 100.273 121.54 98.169 121.58'
. ' 100.273 121.54 98.169 121.58'
. ' 100.273 121.54 98.169 121.58';
Benchmark::cmpthese(0, {
split => sub { @data = split(/\s+/, $line) },
fixed_length => sub { @data = $line =~ /^.{8} {6}(.{10})(.{10})(.{1
+0})(.{10})(.{10})(.{10})(.{10})(.{10})(.{10})(.{10})(.{10})(.{10})$/
+},
var_length => sub { @data = $line =~ /^.{8}\s+(\S+)\s+(\S+)\s+(\S
++)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+
+(\S+)$/ },
});
__END__
Rate split var_length fixed_length
split 63116/s -- -30% -87%
var_length 90310/s 43% -- -81%
fixed_length 482454/s 664% 434% --
Of course, fixed_length would assume that you do your own joining, since join would not preserve field widths.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|