Wzprof, a cross-language profiler using WebAssembly
We are excited to present wzprof: a pprof-based profiler for WebAssembly modules. With it we can collect CPU and memory profiles during their execution. You execute your program compiled to WebAssembly under wzprof, and you get profiling metrics that can be consumed by anything that understands the pprof format (e.g. go pprof, Pyroscope, Parca). A few things motivated us to build this tool. WebAssembly runtimes typically allow profiling guest code via an external profiler such as perf, but in many cases, the recording and analysis of profiles remain a difficult task, especially due to…
In plain words
Wzprof is a profiler for WebAssembly modules that collects CPU and memory profiles during execution. Users run their WebAssembly programs under wzprof to generate profiling metrics in pprof format, which can be analyzed with standard tools like go pprof, Pyroscope, or Parca. It simplifies profiling WebAssembly applications by providing a familiar pprof-based interface, addressing the complexity of profiling with external tools and JIT compilation features.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
We are excited to present wzprof: a pprof-based profiler for WebAssembly modules. With it we can collect CPU and memory profiles during their execution. You execute your program compiled to WebAssembly under wzprof, and you get profiling metrics that can be consumed by anything that understands the pprof format (e.g. go pprof, Pyroscope, Parca). A few things motivated us to build this tool. WebAssembly runtimes typically allow profiling guest code via an external profiler such as perf, but in many cases, the recording and analysis of profiles remain a difficult task, especially due to features like JIT compilation. pprof is the de-facto standard profiling tool for Go programs and offers some of the simplest and quickest ways to gather insight into the performance of an application. wzprof aims the combine the capabilities and user experience of pprof, enabling the profiling of any application compiled to WebAssembly.
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