Given string with text, I need to create n-grams of predefined lengths. I came up with the following. Any suggestions on how to improve it (being speed an important factor in my process?). The sentence, i.e. the array will contain typically 5-15 elements.

use strict;
use warnings;
my $sentence = "this is the text to play with";
my @string = split / /, $sentence;

my $ngramWindow_MIN = 2;
my $ngramWindow_MAX = 3;

for ($ngramWindow_MIN .. $ngramWindow_MAX){
    my $ngramWindow=$_;
    my $sizeString = (@string) - $ngramWindow;

    foreach (0 .. $sizeString){
        print "START INDEX: $_ :";
        print "@string[$_..($_+$ngramWindow-1)]\n"; 
    }
}

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In reply to improving speed in ngrams algorithm by IB2017

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