interpreter

Python 3.2 - GIL - good/bad?

由 若如初见. 提交于 2019-12-09 04:13:27
问题 Python 3.2 ALPHA is out. From the Change Log, it appears the GIL has been entirely rewritten. A few questions: Is having a GIL good or bad? (and why). Is the new GIL better? If so, how? UPDATE : I'm fairly new to Python. So all of this is new to my but I do at least understand that the existence of a GIL with CPython is a huge deal. Question though, why does CPython not just clone the interpreter like Perl does in an attempt to remove the need for the GIL? 回答1: The best explanation I've seen

Perl: Why is it slower to declare (my) variables inside a loop?

由 淺唱寂寞╮ 提交于 2019-12-09 03:13:11
问题 What's the difference, from the interpreter's POV, between the following the following programs: #!/usr/bin/perl -w use strict; for (1..10000000) { my $jimmy = $_**2; } and #!/usr/bin/perl -w use strict; my $jimmy; for (1..10000000) { $jimmy = $_**2; } "time" reports for the first program: real 0m1.519s user 0m1.513s sys 0m0.004s and for the second: real 0m1.023s user 0m1.012s sys 0m0.002s 回答1: The my declaration in Perl has two primary effects; a compile-time one (wherein it allocates a slot

Will PHP be slower if we add too many comments in code files? [duplicate]

由 安稳与你 提交于 2019-12-09 02:44:37
问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Commenting interpreted code and performance Does comments affect when including files in PHP? Let's say we have 100 class files and everytime when a page is requested, all these classes must be parsed by PHP. Will PHP be slower if almost 1 half of the source code lines are the comments? Because usually I add a lot of comments & descriptions to code. This doesn't matter to compilers coz comments are not compiled,

Sublime Text 2 - running selected python code in the interpreter

由 二次信任 提交于 2019-12-08 14:56:13
问题 While editing a python script in the Sublime Text editor, I would like to run the script line by line, or block after block in the embedded interpreter. Is there a convenient way how to do that? Perfect way for me would be: select a few lines of code hit a shortcut, which will run the selected code inside the interpreter 回答1: There are two choices I think, one can be using PdbSublimeTextSupport, available here: http://pypi.python.org/pypi/PdbSublimeTextSupport Or you can try SublimeREPL, that

Which things can the Python interpreter optimize? [closed]

由 て烟熏妆下的殇ゞ 提交于 2019-12-08 12:01:27
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . I think due to lazy evaluation statements like: if True and True (...): # do something ...should be skipped right after the True and part by the Python interpreter. However, in contrast to compiled Code, I think the Python interpreter can not optimize bad style like explicit

How to intercept LLVM lli tool input?

由 青春壹個敷衍的年華 提交于 2019-12-08 01:02:14
问题 I'd like to use LLVM lli tool as static library (rename main() to lli() and export it in libLLi.a) - to create rich UI for it. How can i modify it (or use without modifications) in order to intercept stdin? Assume i know how to generate LLVM assembly file (using clang -S -emit-llvm .. -o output.ll ) and how to execute it using lli tool ( lli output.ll ). Common use case: Source code of simple app to be interpreted by lli: #include <iostream> using namespace std; int main() { char name[128];

Eclipse: connect to custom python interpreter with PyDev

由 懵懂的女人 提交于 2019-12-07 18:14:39
问题 I love Eclipse and PyDev because it always has the features I need. This time I'd like to connect PyDev to my interpreter that is already running. My interpreter is embedded in my game application, that's why. If it would make it easier, I can also start the game application from Eclipse. However, I've tried to add my game .exe in the interpreter configuration in PyDev but it cannot be started because the .exe need some .cfg files that are located in the .exe's folder. Ecplise seems to not

How to get python interpreter path in uwsgi process

由 回眸只為那壹抹淺笑 提交于 2019-12-07 17:55:28
问题 How can I get python interpreter path in uwsgi process (if I started it with -h parameter)? I tryed to use VIRTUAL_ENV and UWSGI_PYHOME environment variables, but they are empty, I do not know why. Also i tryed to use sys.executable , but it points to uwsgi process path. 回答1: uWSGI is not a python application (it only calls libpython functions) so the effective executable is the uwsgi binary. If you use virtualenvs you can assume the binary is in venv/bin/python 来源： https://stackoverflow.com

Scala: How to instantiate an interpreter that inherits the current context?

由 ℡╲_俬逩灬. 提交于 2019-12-07 16:36:33
In a Scala code, I'd like to create an interpreter that will evaluate some strings which are Scala code, e.g., using ScriptEngine. But I'd like to pass the current variable and type definitions to it so that the code in the strings can use them, as if the new interpreter is forked from the current interpreter. With ScriptEngine I could use use the "put" method to put bindings into it, but this needs to be explicit and for each variable. And, there's no way to pass a class definition, or a method etc. Is there a way then, or am I misunderstanding something? The purpose is to let dynamic code to

Need a formula interpreter for .Net [closed]

由 若如初见. 提交于 2019-12-07 02:21:57
问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I'm looking for a formula interpreter that I can use in a C# application. It needs to be able to interpret a string like this: max(1+2
订阅 interpreter