My country is under a daylight saving time period and not all my commits are made during the morning/afternoon. Because I commited after 11:00 PM - which, given the local DST, was after 00:00 AM - my 100+ days commit streak got broken - which made me very unhappy.
alexmitelman
jboner
/ latency.txt
Last active
November 17, 2024 11:32
Latency Numbers Every Programmer Should Know
This file contains 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 |
ythecombinator
/ change-commit-date.md
Last active
March 16, 2022 18:35
Changin' a commit timestamp.
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?
alexcasalboni
/ aws-lambda-static-type-checker.md
Last active
May 22, 2023 07:31
AWS Lambda Static Type Checker Example (Python3)