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@schmunk42
schmunk42 / gist:4349624
Created December 20, 2012 23:44
Updated Yii Metadata component from http://www.yiiframework.com/extension/metadata/
<?
/**
* Metadata Helps to get metadata about models,controllers and actions in application*
*
* For using you need:
* 1. Place this file to directory with components of your application (your_app_dir/protected/components)
* 2. Add it to 'components' in your application config (your_app_dir/protected/config/main.php)
* 'components'=>array(
* 'metadata'=>array('class'=>'Metadata'),
* ...
@jboner
jboner / latency.txt
Last active May 17, 2025 16:50
Latency Numbers Every Programmer Should Know
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