# 📊 Performance
# Time and space complexity
| term | description |
|---|---|
| time complexity | time |
| space complexity | How much memoery is consumed |
- How to measure and analyse the complexity of your algorithm?
Asymptotic Notation / Analysis Big-O
- How many times an instruction runs? How often?
- Narrow down variables in function to fastest growing expression
| Notation | Time complexity |
|---|---|
| constant Time | |
| Logarithmic Time | |
| Linear Time | |
| Quadratic Time | |
| Exponential Time |
How to accurately measure runtime of js script in node?
performance.now();