ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats
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<!DOCTYPE html> | |
<html> | |
<head> | |
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script> | |
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> | |
</head> | |
<body> | |
<table id="split"> | |
<thead></thead> | |
<tbody></tbody> |
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/* Flatten das boostrap */ | |
.well, .navbar-inner, .popover, .btn, .tooltip, input, select, textarea, pre, .progress, .modal, .add-on, .alert, .table-bordered, .nav>.active>a, .dropdown-menu, .tooltip-inner, .badge, .label, .img-polaroid { | |
-moz-box-shadow: none !important; | |
-webkit-box-shadow: none !important; | |
box-shadow: none !important; | |
-webkit-border-radius: 0px !important; | |
-moz-border-radius: 0px !important; | |
border-radius: 0px !important; | |
border-collapse: collapse !important; | |
background-image: none !important; |
L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns on recent CPU
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 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns = 20 µs
SSD random read ........................ 150,000 ns = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs 4X memory
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#include<stdio.h> | |
#include<string.h> | |
#include<stdlib.h> | |
#include<sys/mman.h> | |
typedef void V;typedef int I;typedef double F;typedef unsigned char C,*S;typedef long L; | |
#define O printf | |
#define R return | |
#define I(a...) if(a) | |
#define W(a...) while(a) |
There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.
All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.
- Loop variables are scoped outside the loop.
What do these lines do? Make predictions and then scroll down.
func print(pi *int) { fmt.Println(*pi) }
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WITH RECURSIVE | |
x(i) AS ( VALUES (0) | |
UNION ALL SELECT i + 1 | |
FROM x | |
WHERE i < 101), | |
Z(Ix, Iy, Cx, Cy, X, Y, I) AS ( | |
SELECT | |
Ix, | |
Iy, | |
X :: FLOAT, |
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-e git://github.com/kennethreitz/inbox.py.git@551b4f44b144564504c687cebdb4c543cb8e9adf#egg=inbox | |
alembic==0.8.3 | |
amqp==1.4.9 | |
anyjson==0.3.3 | |
boto==2.39.0 | |
braintree==3.20.0 | |
cairosvg==1.0.19 | |
celery==3.1.20 |
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import collections | |
import math | |
import os | |
import cv2 | |
import numpy as np | |
import time | |
MAX_LINES = 4000 | |
N_PINS = 36*8 | |
MIN_LOOP = 20 # To avoid getting stuck in a loop |
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