What is loop unrolling?

Practice Questions

Q1
What is loop unrolling?
  1. A technique to increase the number of iterations in a loop
  2. A method to reduce the overhead of loop control
  3. A way to eliminate loops entirely
  4. A technique to optimize recursive functions

Questions & Step-by-Step Solutions

What is loop unrolling?
  • Step 1: Understand that a loop is a way to repeat a set of instructions multiple times in programming.
  • Step 2: Realize that each time a loop runs, there is some overhead, like checking if the loop should continue.
  • Step 3: Loop unrolling means taking a loop that repeats many times and rewriting it to do more work in each run.
  • Step 4: For example, instead of adding 1 to a number 10 times in a loop, you could add 1 to the number 5 times in one go, and then do that twice.
  • Step 5: This reduces the number of times the loop control (like checking if it should continue) happens, making the program run faster.
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