Models | Examples |
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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 |
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module.exports = function(grunt) { | |
grunt.initConfig({ | |
pkg: grunt.file.readJSON( 'package.json' ), | |
emberTemplates: { | |
compile: { | |
options: { | |
templateBasePath: /assets\/js\/app\/templates\// | |
}, | |
files: { |
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# The blog post that started it all: https://neocities.org/blog/the-fcc-is-now-rate-limited | |
# | |
# Current known FCC address ranges: | |
# https://news.ycombinator.com/item?id=7716915 | |
# | |
# Confirm/locate FCC IP ranges with this: http://whois.arin.net/rest/net/NET-165-135-0-0-1/pft | |
# | |
# In your nginx.conf: | |
location / { |
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-module(horr). | |
-export([malloc/0, free/1, read/1, write/2, test/0]). | |
% You can use `malloc` to get a globally sharable, mutable cell of memory. | |
% A difference to C's `malloc` is that such a cell doesn't have a certain size (you can't overflow) | |
% Memory is initialised with the atom `null`. | |
malloc() -> | |
spawn(fun() -> mem(null) end). | |
% As processes are not garbage collected, you have to call `free` when you're done with your memory: |
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#include <stdio.h> | |
#define SQ(x) (x)*(x) | |
#define M0(x,y) SQ(x)+SQ(y)<4?0:0xe0 | |
#define M1(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M0(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0)):0xc0 | |
#define M2(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M1(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0xa0 | |
#define M3(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M2(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x80 | |
#define M4(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M3(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x60 | |
#define M5(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M4(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x40 |