| 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 |
| package main | |
| import ( | |
| "fmt" | |
| "io" | |
| "log" | |
| "net/http" | |
| ) | |
| type HttpConnection struct { |
People
 :bowtie: |
😄 :smile: |
😆 :laughing: |
|---|---|---|
😊 :blush: |
😃 :smiley: |
:relaxed: |
😏 :smirk: |
😍 :heart_eyes: |
😘 :kissing_heart: |
😚 :kissing_closed_eyes: |
😳 :flushed: |
😌 :relieved: |
😆 :satisfied: |
😁 :grin: |
😉 :wink: |
😜 :stuck_out_tongue_winking_eye: |
😝 :stuck_out_tongue_closed_eyes: |
😀 :grinning: |
😗 :kissing: |
😙 :kissing_smiling_eyes: |
😛 :stuck_out_tongue: |
| KEYBINDINGS | |
| byobu keybindings can be user defined in /usr/share/byobu/keybindings/ (or within .screenrc if byobu-export was used). The common key bindings | |
| are: | |
| F2 - Create a new window | |
| F3 - Move to previous window | |
| F4 - Move to next window |
| // | |
| // The new assembly support in Solidity makes writing helpers easy. | |
| // Many have complained how complex it is to use `ecrecover`, especially in conjunction | |
| // with the `eth_sign` RPC call. Here is a helper, which makes that a matter of a single call. | |
| // | |
| // Sample input parameters: | |
| // (with v=0) | |
| // "0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad", | |
| // "0xaca7da997ad177f040240cdccf6905b71ab16b74434388c3a72f34fd25d6439346b2bac274ff29b48b3ea6e2d04c1336eaceafda3c53ab483fc3ff12fac3ebf200", | |
| // "0x0e5cb767cce09a7f3ca594df118aa519be5e2b5a" |
| library ArrayUtil { | |
| /** Finds the index of a given value in an array. */ | |
| function IndexOf(uint[] values, uint value) returns(uint) { | |
| uint i = 0; | |
| while (values[i] != value) { | |
| i++; | |
| } | |
| return i; | |
| } |
| // package.json | |
| { | |
| "dependencies": { | |
| "web3": "0.17.0-alpha", | |
| "solc": "^0.4.4" | |
| } | |
| } | |
| //Create file Ecrow.sol and create 3 variables: a buyer, a seller, and an arbiter | |
| contract Escrow { |
| #!/usr/bin/env bash | |
| ### usage example:$ go-versions 1.13.4 | |
| set -e | |
| export GOVERSION="$1" | |
| [[ ! -z "$2" ]] && export LOCAL_BIN="$2" | |
| [[ -z "${LOCAL_BIN}" ]] && export LOCAL_BIN="${HOME}/bin" | |
| [[ ! -d "${LOCAL_BIN}" ]] && mkdir -p "${LOCAL_BIN}" |
| # This code is an example for a tutorial on Ubuntu Unity/Gnome AppIndicators: | |
| # http://candidtim.github.io/appindicator/2014/09/13/ubuntu-appindicator-step-by-step.html | |
| import os | |
| import signal | |
| import json | |
| from urllib import request | |
| from urllib.error import URLError | |
| from urllib.request import urlopen |
| package main | |
| import ( | |
| "bytes" | |
| "crypto/tls" | |
| "encoding/base64" | |
| "encoding/xml" | |
| "fmt" | |
| "log" | |
| "net/http" |