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function convertMS(ms) { | |
var d, h, m, s; | |
s = Math.floor(ms / 1000); | |
m = Math.floor(s / 60); | |
s = s % 60; | |
h = Math.floor(m / 60); | |
m = m % 60; | |
d = Math.floor(h / 24); | |
h = h % 24; | |
return { d: d, h: h, m: m, s: s }; |
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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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// Implementation in ES6 | |
function pagination(c, m) { | |
var current = c, | |
last = m, | |
delta = 2, | |
left = current - delta, | |
right = current + delta + 1, | |
range = [], | |
rangeWithDots = [], | |
l; |
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft
,elem.offsetTop
,elem.offsetWidth
,elem.offsetHeight
,elem.offsetParent
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query IntrospectionQuery { | |
__schema { | |
queryType { name } | |
mutationType { name } | |
subscriptionType { name } | |
types { | |
...FullType | |
} | |
directives { |
[plexmediaserver]
title=Plex Media Server
description=The Plex Media Server is smart software that makes playing Movies, TV Shows and other media on your computer simple
ports=32400/tcp|1900/udp|32469/udp|5353/udp
[sonarr]
title=Sonarr
description=Sonarr is a PVR for Usenet and BitTorrent users
ports=8989/tcp|8989/udp
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#include <stdio.h> | |
#include <sys/mman.h> | |
#include <fcntl.h> | |
#include <unistd.h> | |
#include <string.h> | |
#define STORAGE_ID "/SHM_TEST" | |
#define STORAGE_SIZE 32 | |
int main(int argc, char *argv[]) |
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