Hands-On WebAssembly for C++ Programmers - Profiling WebAssembly

The video tutorial covers performance profiling in Emscripten, focusing on memory and CPU profiling tools. It explains how to enable and use the memory profiler to detect memory leaks and track allocations. The tutorial also discusses using the browser's CPU profiler to analyze function call times and performance bottlenecks. The video concludes with a brief overview of interpreting performance data using flame charts and a preview of the next topic on execution tracing.

Why is it not advisable to guess where bottlenecks are in your system?

• It is too expensive.

• It requires advanced tools.

• It rarely turns out well.

• It is time-consuming.

What is one of the main benefits of using the memory profiler in Emscripten?

• It automatically fixes memory leaks.

• It provides detailed memory usage statistics.

• It speeds up the program execution.

• It reduces the size of the code.

What additional flag is used with the memory profiler to get more detailed information?

• Dash Dash optimize

• Dash Dash symbols

• Dash Dash debug

• Dash Dash memory

Which profiler does the narrator prefer for CPU profiling?

• A custom-made CPU profiler

• Emscripten's built-in CPU profiler

• A third-party CPU profiler

• The built-in browser CPU profiler

What does the call tree in CPU profiling help you understand?

• The number of errors in the code

• The percentage of time spent in each function

• The graphical output of the program

• The memory usage of each function

What does the JavaScript flame chart track in addition to JavaScript?

• Network requests

• WebAssembly execution

• CSS styling

• HTML rendering

What is the purpose of using the Dash Dash profiling flag?

• To enhance graphics performance

• To provide useful profiling information

• To reduce code size

• To increase memory allocation