TIL, 2018-03-23

Musings

• Normalization: Just do it until it hurts.
• Summary tables?

• Redis data structure costs: Hash is more efficient for objects.

• Investigating Redis memory usage:
  • Sets are approximately 60% smaller than hashes or strings, but allow the same algorithmic complexity for lookup.
  • Sorted sets are about 60% larger than their unsorted counterparts which seems pretty reasonable considering the quantity of additional information being stored.
• ruby-prof dive:
  • You get to understand like how much time is actually spent in the methods.
• Stack vs heap:
  • Stack is for static memory allocation.
  • Heap is for dynamic memory allocation.

Answering Back-end Interview Questions