Foundation · Optimization · Tips & Tricks · Uncategorized

Allocation-Free Collections

Say you have a method that creates a temporary list to gather some data. You calculate some statistics based on that data and then you destroy the list again. You call this method a lot, resulting in lots of memory allocations and deallocations and increased memory fragmentation. In addition, all this memory management takes time… Continue reading Allocation-Free Collections

Optimization · Tips & Tricks · Uncategorized

Inline Variables can increase performance

Delphi 10.3 Rio will add inline variables to the language. Besides the various benefits mentioned in Marco’s blog post that introduces the concept, inline variables can potentially improve performance of your code. It’s all about scope If you have been reading my articles, then you may know that I am a sucker for performance. That’s… Continue reading Inline Variables can increase performance

Foundation · Libraries · Uncategorized

Query JSON documents with JSONPath

We have extended our JSON and BSON library with functionality to query JSON documents using an XPath-like query language called JSONPath. About JSONPath JSONPath is to JSON what XPath is to XML. It enables you to search for data in a JSON document using a simple query language somewhat similar to XPath. Although there is… Continue reading Query JSON documents with JSONPath

Libraries · Tips & Tricks · Uncategorized

Chet – A C Header Translator powered by Clang

In my previous post on libclang for Delphi, I mentioned an obvious use case for libclang: to build a (better) C-to-Pascal header converter. I also suggested I may provide such a tool in the future. Well, the future is here and I put my money where my mouth is. The result is Chet, a sort of… Continue reading Chet – A C Header Translator powered by Clang

Libraries · Uncategorized

JavaScripting with Duktape for Delphi

Looking to add JavaScript capabilities to you app, but without the bulk and overhead of JIT engines like V8, SpiderMonkey and Chakra? Then take a look at Duktape. Duktape is a lightweight, embeddable and cross-platform JavaScript engine. It fits into a DLL just over half a megabyte in size but supports the complete ECMAScript 5.1… Continue reading JavaScripting with Duktape for Delphi

Libraries · Patterns · Uncategorized

MVVM Starter Kit (Part 3 of 3)

In this 3rd and final part of the MVVM series we tie everything together by looking at the Views and how to bind controls and actions to their ViewModels. We show that by putting most UI logic in the ViewModel, we can easily create both an FMX and VCL version of the same application with… Continue reading MVVM Starter Kit (Part 3 of 3)