Gerald Venzl gvenzl
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gvenzl
/ sqlcl.sh
Last active
February 1, 2023 18:11
— forked from krisrice/sqlcl.sh
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| sql() { | |
| # REMOTE source this script | |
| # | |
| # . <(curl -s https://gist.githubusercontent.com/krisrice/fec43fd9f53e4286e5cc360b554e3c0f/raw/62ec382d7511c7cc44703a9a2f75a4a7f233efe2/sqlcl.sh) | |
| # Set the stage directory | |
| STAGE_DIR=/var/tmp | |
| # Check whether internet connection exists | |
| if ping -c 1 -W 3 download.oracle.com > /dev/null; then |
gvenzl
/ latency.txt
Created
August 7, 2019 17:32
— forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
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| 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 |