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@jboner
jboner / latency.txt
Last active May 5, 2024 03:12
Latency Numbers Every Programmer Should Know
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

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.


Effective Engineer - Notes

What's an Effective Engineer?

@mobilemind
mobilemind / git-tag-delete-local-and-remote.sh
Last active April 30, 2024 23:36
how to delete a git tag locally and remote
# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345
# alternative approach
git push --delete origin tagName
git tag -d tagName
@niksumeiko
niksumeiko / git.migrate
Last active April 30, 2024 12:54
Moving git repository and all its branches, tags to a new remote repository keeping commits history
#!/bin/bash
# Sometimes you need to move your existing git repository
# to a new remote repository (/new remote origin).
# Here are a simple and quick steps that does exactly this.
#
# Let's assume we call "old repo" the repository you wish
# to move, and "new repo" the one you wish to move to.
#
### Step 1. Make sure you have a local copy of all "old repo"
### branches and tags.
@1nikolas
1nikolas / genymotion-4.x.md
Last active April 29, 2024 08:52
Install Android 4.1, 4.2, 4.3 on Genymotion

Install Android 4.1, 4.2, 4.3 on Genymotion

I found a way to install older Android versions (4.x) on latest version of Genymotion. I only tested it on Windows but it should work on Mac and Linux too. So here is what you need to do:

Step 1

Download the required Android image. I've reuploaded the files to Mega and saved them on the WayBack Machine.

@jamtur01
jamtur01 / ladder.md
Last active April 28, 2024 20:07
Kickstarter Engineering Ladder
@alphamu
alphamu / Android Privacy Policy Template
Created February 9, 2017 03:17
A template for creating your own privacy policy for Android apps. Look for "[" and "<!--" to see where you need to edit this app in order to create your own privacy olicy.
<html>
<body>
<h2>Privacy Policy</h2>
<p>[Individual or Company Name] built the [App Name] app as a [open source | free | freemium | ad-supported | commercial] app. This SERVICE is provided by [Individual or company name] [at no cost] and is intended
for use as is.</p>
<p>This page is used to inform website visitors regarding [my|our] policies with the collection, use, and
disclosure of Personal Information if anyone decided to use [my|our] Service.</p>
<p>If you choose to use [my|our] Service, then you agree to the collection and use of information in
relation with this policy. The Personal Information that [I|we] collect are used for providing and
improving the Service. [I|We] will not use or share your information with anyone except as described
@JaviLorbada
JaviLorbada / FRP iOS Learning resources.md
Last active April 8, 2024 18:07
The best FRP iOS resources.

Videos

Repo

Haven't decided if I am going to submit code to it yet

Questions

👍 - Unlocked & Done 😊 - Locked & Done 🔒 - Locked & Not Done [] - Not yet Done

@granoeste
granoeste / EachDirectoryPath.md
Last active April 4, 2024 22:32
[Android] How to get the each directory path.

System directories

Method Result
Environment.getDataDirectory() /data
Environment.getDownloadCacheDirectory() /cache
Environment.getRootDirectory() /system

External storage directories