dhat-to-flamegraph

Installation

$ cargo install dhat-to-flamegraph

Usage

Convert dhat JSON output to a flamegraph

Usage: dhat-to-flamegraph [OPTIONS] <INPUT>

Arguments:
  <INPUT>
          The dhat JSON file to process

Options:
  -o, --output <OUTPUT>
          Where to place the output
          
          If not provided then stdout is used.

  -f, --format <FORMAT>
          Which output format to use

          Possible values:
          - svg:    Format as svg (default)
          - folded: Format as folded stack traces

  -m, --metric <METRIC>
          Possible values:
          - total:    Measure all traces, output total memory usage per trace (default)
          - max:      Measure all traces, output max memory usage per trace
          - end:      Measure only the remaining traces at program end, useful to find leaks
          - heap-max: Measure only the traces at max heap usage, useful to find spikes

  -u, --unit <UNIT>
          Possible values:
          - bytes:     Measure allocations in bytes (default)
          - blocks:    Measure allocations in blocks, useful to find allocation counts
          - lifetimes: Measure allocations in lifetimes, useful to find short-lived allocations

  -h, --help
          Print help (see a summary with '-h')

Usage example:

dhat-to-flamegraph fixtures/dhat-heap.json > out.svg
open out.svg

See Also

• nnethercote/dhat-rs

Safety

This crate uses #![deny(unsafe_code)] to ensure everything is implemented in 100% Safe Rust.

Contributing

Want to join us? Check out our "Contributing" guide and take a look at some of these issues:

• Issues labeled "good first issue"
• Issues labeled "help wanted"

License