| 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 |
Sometimes you want to have a subdirectory on the master branch be the root directory of a repository’s gh-pages branch. This is useful for things like sites developed with Yeoman, or if you have a Jekyll site contained in the master branch alongside the rest of your code.
For the sake of this example, let’s pretend the subfolder containing your site is named dist.
Remove the dist directory from the project’s .gitignore file (it’s ignored by default by Yeoman).
| // This script will boot app.js with the number of workers | |
| // specified in WORKER_COUNT. | |
| // | |
| // The master will respond to SIGHUP, which will trigger | |
| // restarting all the workers and reloading the app. | |
| var cluster = require('cluster'); | |
| var workerCount = process.env.WORKER_COUNT || 2; | |
| // Defines what each worker needs to run |
| __author__ = 'Amal G Jose' | |
| import os | |
| import tornado.httpserver | |
| import tornado.ioloop | |
| import tornado.options | |
| import tornado.web | |
| class HelloWorldHandler(tornado.web.RequestHandler): |
No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.
Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.
This is a working example on how to store CryptoKeys locally in your browser. We are able to save the objects, without serializing them. This means we can keep them not exportable (which might be more secure?? not sure what attack vectors this prevents).
To try out this example, first make sure you are in a browser that has support for async...await and indexedDB (latest chrome canary with chrome://flags "Enable Experimental Javascript" works). Load some page and copy and paste this code into the console. Then call encryptDataSaveKey(). This will create a private/public key pair and encrypted some random data with the private key. Then save both of them. Now reload the page, copy in the code, and run loadKeyDecryptData(). It will load the keys and encrypted data and decrypt it. You should see the same data logged both times.
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.
| 0x00 0 STOP | |
| 0x01 3 ADD | |
| 0x02 5 MUL | |
| 0x03 3 SUB | |
| 0x04 5 DIV | |
| 0x05 5 SDIV | |
| 0x06 5 MOD | |
| 0x07 5 SMOD | |
| 0x08 8 ADDMOD | |
| 0x09 8 MULMOD |
| to generate example certs | |
| openssl req -x509 -nodes -days 365 -newkey rsa:1024 -keyout host.key -out host.crt | |
| run server: | |
| chmod +x server.py | |
| ./server.py | |
| test server: | |
| openssl s_client -connect localhost:8888 |
| pragma solidity ^0.5.0; | |
| import "github.com/openzeppelin/openzeppelin-contracts/contracts/math/SafeMath.sol"; | |
| import "github.com/openzeppelin/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol"; | |
| import "github.com/openzeppelin/openzeppelin-contracts/contracts/token/ERC20/ERC20Detailed.sol"; | |
| import "github.com/openzeppelin/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol"; | |
| contract Unipool is ERC20, ERC20Detailed("Unipool", "SNX-UNP", 18) { |
