Benchmark memory usage of tokio-tungstenite between 0.24 and 0.25

The source code is the official ping/pong example from the tokio-tungstenite repository.

The results are obtained with heaptrack, a heap memory profiler and k6 a load tester.

tokio-tungstenite 0.24.0

• Calls to allocation functions: 341,152 (3,694/s)
• Temporary allocations: 60,021 (17.59%, 649/s)
• Peak heap memory usage: 106.1MB
• Peak RSS: 119.6MB
• Total runtime: 1min32s

heaptrack 0.24 file

tokio-tungstenite 0.25.0

• Calls to allocation functions: 324,172 (3,064/s)
• Temporary allocations: 68,341 (21.08%, 646/s)
• Peak heap memory usage: 908MB
• Peak RSS: 936MB
• Total runtime: 1min45s

heaptrack 0.25 file

Reproduction steps

• install k6
• cd tokio-tungstenite-0-24 && cargo run -r -p
• k6 run k6-script.js
• cd tokio-tungstenite-0-25 && cargo run -r -p
• k6 run k6-script.js