| 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 |
I just had to set up Jenkins to use GitHub. My notes (to myself, mostly):
For setting up Jenkins to build GitHub projects. This assumes some ability to manage Jenkins, use the command line, set up a utility LDAP account, etc. Please share or improve this Gist as needed.
In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:
http://techcrunch.com/2007/08/11/facebook-source-code-leaked/
It became a big deal:
http://www.techmeme.com/070812/p1#a070812p1
The two files are index.php (the homepage) and search.php (the search page)
| ======= Prolbem ================================================================================================================= | |
| I have installed : ruby-2.0.0,postgres-9.2 , now in rails app when I execute: | |
| rake db:create , command I get: | |
| PG::InvalidParameterValue: ERROR: new encoding (UTF8) is incompatible with the encoding of the template database (SQL_ASCII) | |
| HINT: Use the same encoding as in the template database, or use template0 as template. | |
| : CREATE DATABASE "my_db_name" ENCODING = 'unicode'....... | |
| bin/rake:16:in `load' |
| #Requests from outside | |
| iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 3080 | |
| iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 3443 | |
| #Requests from localhost | |
| iptables -t nat -I OUTPUT -p tcp -d 127.0.0.1 --dport 80 -j REDIRECT --to-ports 3080 | |
| iptables -t nat -I OUTPUT -p tcp -d 127.0.0.1 --dport 443 -j REDIRECT --to-ports 3443 |
| console.log('Loading event'); | |
| var Q = require('q'); | |
| var aws = require('aws-sdk'); | |
| var cloudfront = new aws.CloudFront(); | |
| exports.handler = function (event, context) { | |
| //_log('Received event: ', event); | |
| var bucket = event.Records[0].s3.bucket.name; |
| #!/usr/bin/env python | |
| # coding: utf-8 | |
| import requests | |
| import csv | |
| register_endpoint = 'https://api3.fox.com/v2.0/register' | |
| login_endpoint = 'https://api3.fox.com/v2.0/login' | |
| post_payacc_endpoint = 'https://api3.fox.com/v2.0/paymentaccount/' | |
| ev_endpoint = 'https://rest-prod-fox.evergent.com/foxusa/addSubscriptions' |
| zip_code dma_code dma_description | |
| 01001 543 SPRINGFIELD - HOLYOKE | |
| 01002 543 SPRINGFIELD - HOLYOKE | |
| 01003 543 SPRINGFIELD - HOLYOKE | |
| 01004 543 SPRINGFIELD - HOLYOKE | |
| 01005 506 BOSTON (MANCHESTER) | |
| 01007 543 SPRINGFIELD - HOLYOKE | |
| 01008 543 SPRINGFIELD - HOLYOKE | |
| 01009 543 SPRINGFIELD - HOLYOKE | |
| 01010 543 SPRINGFIELD - HOLYOKE |
