Use Psyco, for python2: import psyco psyco.full() Also, enable doublebuffering. For example: from pygame.locals import * flags = FULLSCREEN | DOUBLEBUF screen = pygame.display.set_mode(resolution, flags, bpp) You could also turn off alpha if you don’t need it: screen.set_alpha(None) Instead of flipping the entire screen every time, keep track of the changed areas and only update … Read more
A layout defines the visual structure for a user interface, such as the UI for an activity or app widget. You can declare a layout in two ways: Declare UI elements in XML. Android provides a straightforward XML vocabulary that corresponds to the View classes and subclasses, such as those for widgets and layouts. Instantiate … Read more
Updated based on feedback from @BenAston & @trincot Roughly, this is what’s happening in both cases: For loop Set the index variable to its initial value Check whether or not to exit the loop Run the body of your loop Increment the index variable Back to step 2 The only overhead that happens on every … Read more
Wait. Before you do anything, do you actually know that your code is encountering denormal values, and that they’re having a measurable performance impact? Assuming you know that, do you know if the algorithm(s) that you’re using is stable if denormal support is turned off? Getting the wrong answer 10x faster is not usually a … Read more
Tag files are typically the way to go if you have a number of logically coherent source files (let’s call them components) and you know the dependencies between the components, e.g. component A uses component B and C, and component B only uses C, and It is ok (or even preferred) that the index files … Read more
To directly answer your question: Your sorting algorithm is technically not O(n) but rather O(n + max), since you need to create an array of size max, which takes O(max) time. This isn’t a problem; in fact, it’s a special case of a well-known sorting algorithm that breaks the Ω(n log n) barrier. So what … Read more
You can take advantage of the complex type : # build a complex array of your cells z = np.array([complex(c.m_x, c.m_y) for c in cells]) First solution # mesh this array so that you will have all combinations m, n = np.meshgrid(z, z) # get the distance via the norm out = abs(m-n) Second solution … Read more
As defined, power is stateless and has no side effects on any enclosing class so it should be declared static. This article from MSDN goes into some of the performance differences of non-static versus static. The call is about four times faster than instantiating and calling, but it really only matters in a tight loop … Read more
I published a nuget package (SqlBulkTools) to solve this problem. Here’s a code example that would achieve a bulk upsert. var bulk = new BulkOperations(); var books = GetBooks(); using (TransactionScope trans = new TransactionScope()) { using (SqlConnection conn = new SqlConnection(ConfigurationManager .ConnectionStrings[“SqlBulkToolsTest”].ConnectionString)) { bulk.Setup<Book>() .ForCollection(books) .WithTable(“Books”) .AddAllColumns() .BulkInsertOrUpdate() .MatchTargetOn(x => x.ISBN) .Commit(conn); } trans.Complete(); … Read more
With a decent query optimiser: it shouldn’t. But in practice, I suspect it might. You can only tell for your cases by measuring. And the measurements will likely change as the distribution of data changes in the database.