PYTHON
sudo yum install glibc-static zlib-static
download python source to /virtualenvs/nodict/Python-2.7.6
Configure to accomplish 3 things: static -pg TODO: NEEDED, ALONG WITH --enable-profiling ?? prefix
PYTHON
sudo yum install glibc-static zlib-static
download python source to /virtualenvs/nodict/Python-2.7.6
Configure to accomplish 3 things: static -pg TODO: NEEDED, ALONG WITH --enable-profiling ?? prefix
@foo = thread_local global i32 3 | |
define i32 @main() { | |
%1 = load i32* @foo | |
ret i32 %1 | |
} | |
// ./x86_64-apple-darwin/llvm/Release+Asserts/bin/llc foo.ll -filetype=obj | |
// gcc -o foo foo.o |
# taken from http://www.piware.de/2011/01/creating-an-https-server-in-python/ | |
# generate server.xml with the following command: | |
# openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes | |
# run as follows: | |
# python simple-https-server.py | |
# then in your browser, visit: | |
# https://localhost:4443 | |
import BaseHTTPServer, SimpleHTTPServer | |
import ssl |
#include <iostream> | |
#include <map> | |
#include <algorithm> | |
#include <functional> | |
#include <memory> | |
using namespace std; | |
class EventArgs { | |
public: |
d3js: Create an HTML table using d3.js and JSON
This is an animated variation of mbostock's normalized stacked barchart. When you click on a block, that block is sent to the bottom of the stack and the bars are reordered by decreasing height of that block. This allows you to compare any value in the stacks with a common baseline, eliminating a common criticism of stacked barcharts.
N = 1024 Accel: 0.05265 FFTW: 0.026213 | |
N = 2048 Accel: 0.042565 FFTW: 0.049334 | |
N = 4096 Accel: 0.049206 FFTW: 0.082782 | |
N = 8192 Accel: 0.118918 FFTW: 0.173506 | |
N = 16384 Accel: 0.200201 FFTW: 0.371488 | |
N = 32768 Accel: 0.356826 FFTW: 1.01589 | |
N = 65536 Accel: 0.844955 FFTW: 1.79316 | |
N = 131072 Accel: 1.95759 FFTW: 3.99565 | |
N = 262144 Accel: 4.34179 FFTW: 9.87287 | |
N = 524288 Accel: 9.31858 FFTW: 19.6675 |
license: gpl-3.0 | |
redirect: https://observablehq.com/@d3/margin-convention |
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 |