inferno

Fixed

• Avoid integer overflow when computing percentages for very large sample counts. #367

Changed

• Upgrade quick-xml to 0.41. #369 This addresses RUSTSEC-2026-0194 and RUSTSEC-2026-0195.
• Moved from libflate to flate2. #361

Changed

• Mitigate overflow risk on 32-bit architectures for flamegraph. #357

Changed

• Mitigate overflow risk on 32-bit architectures for collapsers. #354
• Upgrade quick-xml to 0.39 and rand to 0.10. #356

Changed

• Upgrade quick-xml to 0.38. #351

Changed

• Fix for consumers trying to use -Zminimal-versions. #343

Added

• Support for collapsing the xml output of the xctrace tool. #286

Fixed

• Trim reversed stacks for when function names contain ; . #338

This is a breaking change since we've changed inferno's error type. It no longer directly exposes quick_xml, which will allow us to adopt new versions of quick_xml (or indeed change the XML crate altogether should we wish) without a breaking change in the future. For most users, this change should be an easy upgrade.

Changed

• Remove quick_xml::Error from the public API. #332
• Remove reliance on the is_terminal crate. #301

Added

• Support for combined stack + ustack DTrace collapse. #328

Changed

• Trim executable name when getting function color. #329

Changed

• More reliably detect Java and avoid double-annotating. #319
• Take period into account when collapsing stacks. #319
• Updated dashmap to v6
• MSRV (sadly) bumped to 1.71.0 for env_logger and clap and dashmap

Changed

• By default, make cargo install strip all binaries. #310

Changed

• Updated ahash version in Cargo.lock for binary consumers. See https://github.com/tkaitchuck/aHash/issues/163.

Removed

Added

• Added collapse-ghcprof. #300

Added

• Added stackcollapse-recursive. #291

Changed

• Upgraded indexmap and libflate to 2.0.

Changed

• Updated to clap v4, which bumped MSRV to 1.64.0. #267
• Updated to env_logger 0.10. #281
• cargo update

Removed

• Removed the dependency on num_cpus in favor of std::thread::available_parallelism. #279
• Removed the dependency on atty in favor of is_terminal. #280

Added

• Add flag --base to filter flamegraphs to only frames at or below a particular set of base frames. #274

Added

• Add flag --uicolor to specify the color to draw UI element text, like the Reset view button. #271

Changed

• Updated ahash to version 0.8
• Updated quick-xml to version 0.26
• Bumped clap to 3.2.0

Changed

• Improved initial render and resize speed for large flamegraphs when a fixed-width (monospace) font is used. #262
• Changed default font of flame graphs to browser's default monospace font to take advantage of this speedup. #262

Added

• Add Python language palette. #240

Changed

• Update particularly-old dependencies.

Changed

• Reverted an internal cleanup from 0.11.8 to fix compilation. #265

Changed

• Revert broken Firefox canvas height computation change. #263

Added

• Ability to set a stroke outline on frames. #255

Changed

• Improved text positioning for right-aligned text. #254

Changed

• Don't quote generic font families in CSS. #252

Changed

• Moved from lazy_static to once_cell. #249

Changed

• Fix for Firefox canvas height unpredictability. #242
• Update quick-xml to 0.23.

Changed

• Fix handling of blank and comment lines in collapsed files. #239

Added

• Add collapser for Visual Studio profiler. #218

Added

• Highlight external NodeJS dependencies. #234

Changed

• Allowed --skip-after to appear multiple times. #231
• Replaces yanked 0.10.13 as the above change is backwards-incompatible.

Changed

• Re-bump dashmap

Changed

• Undo dashmap bump since 5.0.0 was yanked

Changed

• Bumped various internal dependencies (notably dashmap and clap)

Added

• collapse-perf gained --skip-after argument. #224

Changed

• Frame skipping will also skip the process frame. #224

Added

• Setting for skipping frames prior to a known frame. #222

Changed

• Upgraded internal dependencies. #216

Changed

• Highlight Rust async/await as user code. #213

Added

• Add Rust language palette. #211

Changed

• Use number of samples instead of fractions for width/x calculations. #210
• Bumped pretty_assertions to 0.7
• Bumped rand to 0.8

Added

• Support jit annotations in collapse-perf for runtimes using the jitdump format. #202

Changed

• Decreased default minimum width from 0.1% to 0.01%. #204
• Detect if STDOUT is a TTY and if it's not, use a BufWriter to avoid line buffering. #206

Changed

• Support for invalid utf8 data in collapse. #196
• Bumped ahash to 0.6
  • Caused a bump of minimum supported Rust version to 1.43
• Bumped crossbeam-channel to 0.5
• Bumped crossbeam-utils to 0.8
• Bumped env-logger to 0.8
• Bumped quick-xml to 0.20

Added

• Support kernel annotations for versioned vmlinux and kernel modules in collapse-perf. #182
• Support of AsyncProfiler generated stack trace in java palette. #183
• --deterministic for deterministic colors without weighting. #190

Changed

• Trimmed down a few unnecessary dependencies. #188

Added

• Flame chart mode. Flame charts put the passage of time on the x-axis instead of the alphabet. #125
• cargo hack to check that all features compile. #181

Changed

• All Options are now marked as #[non_exhaustive] so that we can add options without making that a breaking change. This also makes feature-dependent fields (like func_nameattr on flamegraph) okay. Unfortunately, it also means that function record update syntax won't work any more (Options { ..., ..Default::default() }). See https://github.com/rust-lang/rust/issues/70564#issuecomment-647031324 for details. #181

Changed

• In icicle/inverted mode, the details bar is now at the top where it can actually be seen. #177

Changed

• Fixes a regression where anonymous namespaces would be pruned. #175
• Adds support for lambda expressions in curly braces in C++ function names. #175

Changed

• Stop pruning () expressions in template position. #174

Added

• Support for combined event/stack lines. #168

Changed

• Fix crash on empty traces. #168
• Also parse last sample in file. #168

Added

• Add a new color option, color diffusion, that makes wider frames redder. This visually draws the eye towards places that need optimization. #165 by @itamarst.

Changed

• Fix bug where subtitles would often be hidden (#161 by @itamarst)

Added

• Overly long frame lanes can be shortened either on the left or the right (#157 by @itamarst)

Changed

• By default, overly long frame lines are now shortened on the left (#157 by @itamarst)

Changed

• Replace chashmap with dashmap (#155 by @koushiro)
• Replace fnv with ahash (#155 by @koushiro)
• Update some outdated dependencies (#155 by @koushiro)
• Upgrade MSRV to 1.40.0 (required by dashmap) (#155 by @koushiro)

Added

• Support for collapsing the CSV output of the VTune amplxe-cl tool (#148 by @jasonrhansen).

Changed

• The sample collapser now returns errors where it used to just log them in places where it doesn't make sense to continue.

Changed

• Support for multi-threaded collapsing was moved behind the multithreaded feature flag which is on by default (#146).
• The structopt dependency has been updated, which bumps the minimum supported Rust version to 1.36.0 (#145).
• Support for nameattr files was moved behind the nameattr feature flag which is on by default (#147).

Removed

• The demangle option for collapsers; we instead rely on the sample generator to demangle names, and then just do some post-processing fixups for common issues (#144).
• The dependency on rand. Reduces the footprint of the crate, and also makes the random color choices seeded by the same number each run (#146).

Added

• Changelog
• Support for collapsing the output of the sample tool on macOS (#133 by @jasonrhansen).
• Multi-core stack collapsing for major speedups (#128 by @bcmyers).
• Support for "fluid drawing" of the SVG (#136 by @jasonrhansen).
• Make zoom and search part of browser history (#121 from @AnderEnder). This is a backport of https://github.com/brendangregg/FlameGraph/pull/198 by @versable.
• The --demangle flag to collapsers for "re-doing" broken symbol demangling from DTrace or perf (#132 by @jasonrhansen).
• Unit tests for semantic coloring. JavaScript: #129 by @jordins Java: #131 by @jkurian
• Cirrus CI for FreeBSD CI (#124 from @AnderEnder)

Changed

• Moved to IndexMap and FNV hashing (#127)
• Moved CI to Azure DevOps Pipelines