Simple overview of use/purpose.
An in-depth paragraph about your project and overview of use.
Himanshu Kumar himanshuk-dev
😀
waleedahmad
/ post_install.sh
Last active
June 20, 2025 06:14
Ubuntu post installation script for installing software of your choice.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/bin/bash | |
| if [[ $EUID -ne 0 ]]; then | |
| echo "This script must be run as root" | |
| exit 1 | |
| else | |
| #Update and Upgrade | |
| echo "Updating and Upgrading" | |
| apt-get update && sudo apt-get upgrade -y |
Picking the right architecture = Picking the right battles + Managing trade-offs
- Clarify and agree on the scope of the system
- User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?
jboner
/ latency.txt
Last active
December 6, 2025 05:41
Latency Numbers Every Programmer Should Know
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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 |