Text classification of equal length texts works without padding, but in reality, practically, texts never have the same length.
For example, spam filtering on blog article:
thanks for sharing [3 tokens] --> 0 (Not spam) this article is great [4 tokens] --> 0 (Not spam) here's <URL> [2 tokens] --> 1 (Spam)
Should I pad the texts on the right:
thanks for sharing -- this article is great here's URL -- --
Or, pad on the left:
-- thanks for sharing this article is great -- -- here's URL
What are the pros and cons of either pad left or right?