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Felix Geisendörfer felixge

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@jboner
jboner / latency.txt
Last active November 15, 2024 14:00
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
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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
@felixge
felixge / 10-ways-to-improve-github-issues.md
Created April 13, 2011 13:02
I love the new GitHub issues, here are some ideas to make it perfect, ordered by priority:

10 Ways to improve Github Issues

I love the new GitHub issues, here are some ideas to make it perfect, ordered by priority:

1. I should be able to pick the assignee and milestone via keyboard when creating a new ticket

2. Keyboard shortcuts should work everywhere. E.g. when viewing an existing issue, 'c' does not work.

3. After creating an issue, the assigned user / milestone should be remembered and pre-filled.

4. Allow assigning a different user while commenting. Right now this deletes my half-typed comment.

5. When typing the @ symbol to mention somebody, it should auto-complete the name.

6. Things feel a little sluggish right now, any speed improvements would be very welcome.