Make LLVM fast again
10. May 2020 The front page of the LLVM website proudly claims that: Clang is an “LLVM native” C/C++/Objective-C compiler, which aims to deliver amazingly fast compiles […] I’m not sure whether this has been true in the past, but it certainly isn’t true now. Each LLVM release is a few percent slower than the last. LLVM 10 put some extra effort in this area, and somehow managed to make Rust compila
PHP 7 Virtual Machine
14. April 2017 This article aims to provide an overview of the Zend Virtual Machine, as it is found in PHP 7. This is not a comprehensive description, but I try to cover most of the important parts, as well as some of the finer details. This description targets PHP version 7.2 (currently in development), but nearly everything also applies to PHP 7.0/7.1. However, the differences to the PHP 5.x ser
PHP's new hashtable implementation
22. December 2014 About three years ago I wrote an article analyzing the memory usage of arrays in PHP 5. As part of the work on the upcoming PHP 7, large parts of the Zend Engine have been rewritten with a focus on smaller data structures requiring fewer allocations. In this article I will provide an overview of the new hashtable implementation and show why it is more efficient than the previous
What PHP 5.5 might look like
10. July 2012 PHP 5.4 was released just four months ago, so it probably is a bit too early to look at the next PHP version. Still I’d like to give all the people who aren’t following the internals mailing list a small sneak peek at what PHP 5.5 might look like. But be sure to understand this: PHP 5.5 is in an early development stage, so nobody knows how the end result will look like. All I am talk
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