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 |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
// imports a couple of java tasks | |
apply plugin: "java" | |
// List available tasks in the shell | |
> gradle tasks | |
// A Closure that configures the sourceSets Task | |
// Sets the main folder as Source folder (where the compiler is looking up the .java files) | |
sourceSets { | |
main.java.srcDir "src/main" |
package com.lambdaworks.redis.experimental.mbean; | |
import java.lang.management.ManagementFactory; | |
import java.util.HashMap; | |
import java.util.Map; | |
import java.util.concurrent.ConcurrentHashMap; | |
import java.util.concurrent.TimeUnit; | |
import javax.management.JMException; | |
import javax.management.MBeanServer; |
FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.
- By Edmond Lau
- Highly Recommended 👍
- http://www.theeffectiveengineer.com/
Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).
docker run -it --rm --privileged --pid=host justincormack/nsenter1
more info: https://github.com/justincormack/nsenter1
javascript: | |
document.querySelectorAll('.load-diff-button').forEach(node => node.click()) |
Add the following in .zshrc: | |
... | |
plugins=(osx git zsh-autosuggestions zsh-syntax-highlighting zsh-nvm docker kubectl) | |
... | |
### Fix slowness of pastes with zsh-syntax-highlighting.zsh | |
pasteinit() { | |
OLD_SELF_INSERT=${${(s.:.)widgets[self-insert]}[2,3]} | |
zle -N self-insert url-quote-magic # I wonder if you'd need `.url-quote-magic`? |