| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
Hello all,
In this gist you may find resources in Russian/English which could be useful for writing Python script for test automation tasks.
While Python 3.x (>=3.3) is reccomended for new project development it much better and easier to go with a bit older but rock-solid Python 2.x (>=2.7) for test automation.
Some Python packages comes with binary modules and it much easier to use 32-bit Python under Windows due to this reason.
| # <type>: (If applied, this commit will...) <subject> (Max 50 char) | |
| # |<---- Using a Maximum Of 50 Characters ---->| | |
| # Explain why this change is being made | |
| # |<---- Try To Limit Each Line to a Maximum Of 72 Characters ---->| | |
| # Provide links or keys to any relevant tickets, articles or other resources | |
| # Example: Github issue #23 |
The book Java Generics and Collections has this information (pages: 188, 211, 222, 240).
List implementations:
get add contains next remove(0) iterator.remove
ArrayList O(1) O(1) O(n) O(1) O(n) O(n)
LinkedList O(n) O(1) O(n) O(1) O(1) O(1)