361–370 of 384 posts
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Sorry, but I feel like I'm a little confused by your post. How can it be 6 times slower to program in JS or Python than C? Isn't this very much contrary to the conventional wisdom?
I think OP wrote programming speed but meant running speed.
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> goroutines are not bound to the OS thread they're created on Neither is a coroutine in Java using the Coroutines library (Javaflow used thread-locals, but Coroutines doesn't), or a Lua-based coroutine...I'm not sure what you're driving at here? > If you're using Ruby Sorry, this was inartfully said. If I am using the JVM, i.e. I want to be using something where I can be bombing around on multiple threads etc., I'm…
> Neither is a coroutine in Java using the Coroutines library (Javaflow used thread-locals, but Coroutines doesn't), or a Lua-based coroutine...I'm not sure what you're driving at here? I'm not familiar with Coroutines or Lua-based coroutines; coroutines are almost always bound to the thread on which they're created, I was pointing out that this is a primary difference between goroutines and coroutines--goroutines ar…
Can you provide a cite for this? I'm not saying you're wrong, just that I've never heard this assertion before (and I have been doing really stupid stuff with coroutines for way too long). My understanding of a coroutine is just that it's just a cooperatively yielding function where a yield returns a continuation for later resumption.
> When writing code, it should be clear how to make the program do what you want. Sometimes this means writing out a loop instead of invoking an obscure function. For example instead of the obscure function a.reverse() you can use the clear for loop for i := len(a)/2-1; i >= 0; i-- { opp := len(a)-1-i a[i], a[opp] = a[opp], a[i] } :(
I love the "strictness" of the language - for example the code won't compile if you declare a variable and not use it, or import a library and not use it. I love that there is a standard gofmt which means code auto formats to a standard format. These features really help set some "discipline" when working in a team.
I love the way concurrent code can be called easily and the use of channels. I love the performance - it has been more than fast enough for my use cases so far. I love that I can get started with an HTTP server using just the standard library, and the most popular web frameworks in go are micro frameworks.
Overall, there's a kind of a simplicity about the language that underlies all of the above things, and that is what makes me excited about go.
I have used go in some minor projects that have been running peacefully for months without any hitches, and am using it in a big project mostly in the form of microservices and scripts. It has become my favorite language now.
> When writing code, it should be clear how to make the program do what you want. Sometimes this means writing out a loop instead of invoking an obscure function. For example instead of the obscure function a.reverse() you can use the clear for loop for i := len(a)/2-1; i >= 0; i-- { opp := len(a)-1-i a[i], a[opp] = a[opp], a[i] } :(
Reverse isn't exactly obscure. Even Go's standard library has: `sort.Rerverse(a)`
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You can toggle the GC with https://golang.org/pkg/runtime/debug/#SetGCPercent . Turn it off before you enter your block and enable it again at the end of your block.
But can you guarantee that the GC actually makes progress that way?
That is, you do this if you want a block to run without the GC interrupting it. That is, it's a really high-priority (realtime, or close) block. When it needs to run, it's the most important use of the CPU. But if you demand that the GC makes progress, you're saying that it also is important. And it is, but it's less important than the critical block. If you don't say that, then you wind up with "everything is important", and that way lies madness.
But you may be able to do it. You need enough CPU bandwidth that you can run your critical sections and spend enough time outside them that the garbage collector keeps up. (And then, every time you add to your code, you need to make sure that the CPU still has enough time...)
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Can't speak for perl because I have only seen some horribly complicated code in it (which probably speak more of the author and not the language itself) but what's not fun about JavaScript ?
I used Perl for years, and it's still my go to language for quick text parsing. I stayed away from the bizzare "object oriented" syntax (They're not classes. They're packages, just called with arrow operators instead of like normal functions. But being Perl, you can just use the package and call the functions yourself because TMTOWTDI! (Blech.)) Also Perl's support (or at least Perl 5 (Does 6 even exist? It's like a…
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The irony in your smug reply is, it echoes the broken leftpad mentality of javascript programmers. Go is statically typed, and this either requires generics or a new built-in for just reversing an array/slice. And I can't see how a trivial operation as array reversion is worth it, and there's just no end to adding such trivial operations. If you need a slice with reverse, just add a typedef and define reverse on it -…
Guilty as charged on the smugness, sorry about that. This reply is meant to be smugness-free. My example above is the semi-official one from https://github.com/golang/go/wiki/SliceTricks . The `oop` expression contains a reference to i, and so it needs to be in the loop body. I'm not sure why they opted to do it in reverse though. (Maybe they don't want to compute `len(a)/2` every time, and don't want to use a temp v…
Using 3rd party code for "basic" stuff only makes sense to me when it's a tricky algorithm to get right (such as quicksort) and the author of the 3rd part code is a renowned/reputable top developer. I definitely don't trust the b+-tree implementation of some random dude on github(which what javascript people do mostly).
No idea who wrote that piece of code, but you can simply define it without the -i part, and write a[last-i] = a[last-i], a[i] in the loop (and better not call it "oop" ---whatever that means). That way, it's very readable and understandable to me:
for i, last := 0, len(a)-1; i If profiling shows that bounds checking in reverse() is a bottleneck in your program (although it's very difficult for me to imagine that this will happen a real-world program), then you probably don't want to use that unsafe code went through "expert attention".
While being a mortal without any specific degree on array handling myself, in the unlikely event that I find reverse() to be a bottleneck in my program, I'd rather write an assembly function which makes use of SSE2/AVX2 to get real speed-up (note that LLVM can't autovectorize that Rust code for you, that code needs a rewrite it you want vectorization).
Unrelated: Rust would probably be around the right-most area in the horizontal axis, close to C and C++, and a little below Go in the vertical axis.
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I'm saying it. The piston developers are doing what right now? Writing a new programming language (dyon). Why are they doing that? Because rust is great for prototyping games in? no. ...rust is verbose. It is statically typed, it is less productive than some other languages and it is hard to learn. Now, you get a whole lot of other benefits in exchange for that, absolutely, and technically speaking, rust is a super a…
> The piston developers are doing what right now? Writing a new programming language (dyon). Why are they doing that? Because rust is great for prototyping games in? I agree with that, Rust is not a scripting language. Dynamically-typed scripting languages have proven their efficiency for prototyping. > rust is verbose. It is statically type, it is less productive than some other languages Than scripting languages ye…
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