Memory Managers and String Building

[This is a guest post, written by Primož Gabrijelčič, www.thedelphigeek.com]

One thing interested me since I started reading Eric’s series on string concatenation performance – how would different memory managers compare in a multi-threaded scenario. Today I decided to spend an hour finding out…

edit 18/11: the tests were run with debug mode, which affected TTextWriter very negatively (TWOBS is also affected a negatively, but less, and StringBuilder and Trivial aren’t affected much). I’ll be repeating tests with more memory managers and in more stable conditions in the next few weeks.

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Source Code for the String Concatenation/Building Benchmark

By popular request, here is the source code used for the previous String benchmarks StringConcatBench.zip, essentially to test alternative memory managers.

The source is nothing complicated as you will see, just a set of simple function with the test cases, and a couple function that measure run times.

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Multi-Threaded String Building in Delphi

After looking at String concatenation and String Building in Delphi, and as a conclusion, it’s time to have a brief look at what happens in multi-threaded settings, such as in a server pushing JSON, XML or some other text data.

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Pimp your WebSite with an Halloween Bat

Time for some Halloween silliness: here is a quick & dirty JavaScript to pimp your website, blog or whatever with a randomly moving vampire bat animation.

Or a dozen. Or a whole flock.

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Efficient String Building in Delphi

As a followup to the String Concatenation article, let’s take a look at a less trivial case: what if instead of concatenating a couple strings, you want to concatenate a few hundred?

Sounds like a task at which TStringBuilder should excel, but one should never assume, and always measure.

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DelphiTools

DWS, Profiler and other Pascal tools

Memory Managers and String Building

Source Code for the String Concatenation/Building Benchmark

Multi-Threaded String Building in Delphi

Pimp your WebSite with an Halloween Bat

Efficient String Building in Delphi