krlohnes

#Debugging Scala with JDB

It seems impossible to find answers on how to debug Scala with jdb on Google. I wanted to consolidate what I've learned in a easy to digest guide. Please feel free to comment with other tips I may have missed, or corrections to what's here.

##Classes Setting a breakpoint in a class is just like debugging java stop at my.package.ClassName:22

garybernhardt

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

gitaarik

Git Submodules - Basic Explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a sub-repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

• Separate big codebases into multiple repositories.

jboner

Latency Comparison Numbers (~2012 except when noted)
----------------------------------
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