For achieving speed, often you'd like to keep your hash table in RAM. Space limits result in speed trade-offs. This is very much a real-world concern when writ

For achieving speed, often you'd like to keep your hash table in RAM. Space limits result in speed trade-offs. This is very much a real-world concern when writing genome aligners. Hash-based mappers were at a disadvantage early on due to the memory constraints of most servers back around 2009-2012, thus the more efficient Burrows-Wheeler transform based algorithms became popular, partly due to significantly reduced RAM needs - one could now align genomes on a laptop!