Typeguard Performance Benchmarks: High-Frequency Overhead, I/O Wrappers, and Optimization
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How Fast is Typeguard? Performance Benchmarks and Analysis​
Understanding the speed of Typeguard is essential when integrating it into performance-critical Python applications. Since Typeguard performs runtime reflection and checking, it inevitably adds overhead. However, the time added is typically measured in microseconds (µs), making it extremely fast for single invocations.
The key factors determining the speed are the complexity of the type signature and the size of the data structure being checked.