Issue For x-ray diffraction one needs to find the solutions to the so called Laue-Equation G_hkl – k_in + |k_in|*(sin(theta) cos(phi) , sin(theta) sin(phi) , cos(theta))=0 where G_hkl is a given 3 dimensional vector, k_in can be chosen as (0,0,1)
Continue readingTag: performance
[SOLVED] How to find Bragg reflexes fast with numpy?
Issue For x-ray diffraction one needs to find the solutions to the so called Laue-Equation G_hkl – k_in + |k_in|*(sin(theta) cos(phi) , sin(theta) sin(phi) , cos(theta))=0 where G_hkl is a given 3 dimensional vector, k_in can be chosen as (0,0,1)
Continue reading[SOLVED] Why is DataGridView (re)draw so slow?
Issue I know there are several questions in SO about slow DataGridViews, but I tried really everything mentioned there and most are about more complex databinding. what I did before: I tested DataTable as Datasource unbound Datagridview, populated in a
Continue reading[SOLVED] How to reduce execution time for sum product calculation?
Issue When I execute the code on more than 10 thousand records it takes approximately 15 to 25 minutes. This code puts a mark to then make a filter and generate a trend graph with the values 1 and 0.
Continue reading[SOLVED] Does a mouseover eventlistener affect performance when the mouse isn't over the attached element?
Issue Suppose you have an element that has a ‘mouseover’ event listener attached to it. When the mouse isn’t over the listener, does the listener still affect performance? I’m using React and mapping an array to generate a list of
Continue reading[SOLVED] Performance: XmlReader or LINQ to XML
Issue I have a 150 MB XML file which is used as DB in my project. Currently I’m using XmlReader to read content from it. I want to know if it is better to use XmlReader or LINQ to XML
Continue reading[SOLVED] Better search from beginning string inside array of objects
Issue I have like this addresses list: const addresses = [ { id: 1, address: "St. East Baltimore, 820", district: [ { id: 1, title: "Mfume" } ] }, { id: 2, address: "St. Darnestown Rd, 12187", district: [ {
Continue reading[SOLVED] Open hidden elements one at a time?
Issue please I am trying to create a FAQ like functionality, I have some elements hidden so when I click on a button it opens and hides it. I have been able to do this but I am not getting
Continue reading[SOLVED] Create sorted array from multiple pre-sorted arrays
Issue I would like to create a sorted array from a variable number of pre-sorted arrays. Given {A1, …, An} which are pre-sorted arrays, I would like to create At, which is the combination of {A1, …, An} and is
Continue reading[SOLVED] Rails create single record VS create multiple records PERFOMANCE difference
Issue Is there speed difference between this methods? (POSTGRESQL) First products = [{…},{…},…] products.each { |p| Product.create(p) } Second products = [{…},{…},…] Product.create(products) Both methods for each record make two queries: 1) INSERT INTO “products” VALUES (..) 2) UPDATE “products”
Continue reading