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package main
import "fmt"
func main() {
fmt.Println("Hello world")
}
The command is go run a.go.
This code need 4~5s in windows.
I believe that go run compiles the code and then runs it. Go 1.5 is known to be much slower at compiling. (Read the release notes) The devs have converted it all to Go code but haven't optimized it for Go yet.
Also Go uses POSIX style disk and network operations. I don't believe anyone has optimized Go for completion ports and Windows asynch IO.
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I read that go libraries no longer are forced to be saved under the GOPATH directory.
Do I have to modify libraries that are older or this just works for all libraries now assuming you have the correct version of Go?
A project using Go modules doesn't need to be under GOPATH (but you still need one for the package cache). A project using Go modules can import any library, whether or not that library uses Go modules.
A project NOT using Go modules must reside under GOPATH.
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I've googled for a while and the only useful infos are:
github.com/barnex/cuda5
mumax.github.io/
Unfortunately, the latest Arch Linux only provides CUDA 7.5 package, so the barnex's project may be not supported.
Arne Vansteenkiste recommends concurrency rather than pure Golang or Golang plus CUDA. What's more, there's someone says the same idea that "Wouldn't it be cool to start a goroutine on a GPU and communicate with it via channels?". I think both of these ideas are wonderful since I would like to change the existing code as little as possible instead of refactoring the whole program. Is the idea possible, or is there some documents introducing this topic in details?
Update
It seems that there's two bindings to HPC in Golang:
CUDA (< 6.0): github.com/barnex/cuda5
OpenCL: github.com/rainliu/gocl
Both of them are less documented, currently what I got is only Macro13's answer, very helpful, but it's more about java . So please help me some detailed materials in Golang. Thanks!
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Is it possible to log all system calls made by a specified program? For example I have a GUI tool, wrapping some command-line based tools. I need to know how does it start command-line programs, what file manipulations is it doing. Actually I want to repeat this actions in integration purposes.
UPD: API Monitor did this job
CreatePorocessA API call - shows external programs and parameters selected process is calling
These things can be handy in case...
http://j00ru.vexillium.org/?p=1010
http://billauer.co.il/blog/2010/07/strace-ltrace-win32-api-dll/
Second one helped me in some other scenario.. Let me know whether it works for you or not...!!
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Hello I made a simple racket program on windows xp sp3
I wonder how can I run many instance like notepad
Is it possible ?
I can't run 2 instance of my program at the same time.
Just like online game, I can't run multiple instance.
If it's something simple, maybe you could just run each instance of your program in a separate tab in Racket (in the menu: File -> New Tab)
This might be hard (or maybe even impossible) at the moment. Please post this question on our mailing list.
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All,
I am proposing the addition of code obfuscation to the standard build process at my organization. One of the questions being asked is whether there is a performance hit to running obfuscated code vs. running unobfuscated code.
What is your experience? Have you seen a reduction in performance at runtime because you obfuscated your Java or C# code?
Thanks,
VI
It depends on how you are obfuscating it. If you use one of the tools that replaces all the names of objets and functions, then there should be no change at all. The compilers don't care what you call anything, whether it's useful to a developer (fetchProjects()) or just (funcA()).
You may wish to read about my over-obfuscation experiments: Impact of Flow Obfuscation on Performance.