Saturday, July 05, 2014


CoreOS - Wikipedia, the free encyclopedia:

CoreOS is an open source lightweight operating system based on the Linux kernel and designed for providing infrastructure to clustered deployments, while focusing on automation, ease of applications deployment, security, reliability and scalability. As an operating system, CoreOS provides only the minimal functionality required for deploying applications inside software containers, together with built-in mechanisms for service discovery and configuration sharing.

CoreOS is a fork of Chrome OS, using its source code freely available through Chromium OS as a base while adding new functionality and customizing it to support hardware used in servers.


CoreOS is Linux for Massive Server Deployments

used in combination with

Docker - Build, Ship, and Run Any App, Anywhere

creative advertising on GoPherConf

Programming Languages Performance: Scala, Go, F#, Java, C++...

Measuring performance - benchmark - is a difficult and tricky with programming languages. One important aspect is "human performance" that is how easy and quick is for a human programmer to make effective and efficient program.

Then there is a "test machine", effect of hardware and system software (OS) and tool (version of compilers etc). That is a job of engineers, "give me limitations to optimize solution".

Google Multi-Language Benchmark with F#:
C++ : 23 sec
Java : 89 sec
Scala: 58 sec
Go : 126 sec

Google’s Multi-Language Benchmark in F# | Faisal's space
same algorithm ported on F#, different machines:
F# 31 sec on Core Duo 2.00 GHz
F# 20 sec on Core i5

Profiling Go Programs - The Go Blog
Same program tested on different environment:
C++ program runs in 17.80 seconds and uses 700 MB of memory.
Go program runs in 25.20 seconds and uses 1302 MB of memory.

The Go final version runs in 2.29 seconds and uses 351 MB of memory:
Then translated the final Go program into equivalent C++ code. Its execution time is similar to the Go program

The main optimization is avoiding memory management by VM.
I would not be surprised that Apple's Swift, that does not use VM, may have excellent performance in most cases...
"Go, F# and Erlang"
This report examines the three languages Erlang, F# and Go, which
all have some form of inherent support for concurrency. T

Cayley: open source graph database in Go Lang

google/cayley · GitHub:

Cayley is an open-source graph inspired by the graph database behind Freebase and Google's Knowledge Graph.

Its goal is to be a part of the developer's toolbox where Linked Data and graph-shaped data (semantic webs, social networks, etc) in general are concerned.
  • Written in Go
  • Easy to get running (3 or 4 commands, below)
  • RESTful API
  • or a REPL if you prefer
  • Built-in query editor and visualizer
  • Multiple query languages...