Changelog

Unreleased

Rewritten in Rust. Flags, keys, views, themes, the configuration file and the snapshot format are unchanged: snapshots from earlier releases open as before, and older releases open new ones. Measured against 1.2.0 on the same machine, scans are about 1.3× faster with a third less memory, cold treemap frames about 3× faster, and filters up to 1.8× faster (see PERFORMANCE.md).
Release builds: Linux (x86-64, ARM64, 32-bit x86, ARMv7, RISC-V 64), macOS (Intel, Apple silicon), Windows (x86-64, ARM64), FreeBSD and NetBSD (x86-64), built and published by CI. OpenBSD and FreeBSD/ARM64 builds are no longer produced.
--log and --log-level are accepted but no log is written yet; --cpuprofile and --memprofile are removed.
Install from source with cargo install; the Homebrew formula builds with Rust.

A search containing certain non-ASCII text (for example voilà) no longer hangs.

On a headless Linux or BSD system (no DISPLAY or WAYLAND_DISPLAY), d deletes permanently after an "are you sure" confirmation instead of moving to a trash nobody empties, and o shows the folder in the map instead of trying to open a file manager. Desktop sessions, macOS and Windows still use the trash and the file manager.

Map: folders that contain a single subfolder (mnt/raid/media/) now collapse into one label instead of each taking a nesting level, so the map at / reaches the shows, seasons and individual files. Nesting goes as deep as the block sizes allow (previously a fixed 3 levels), and nested blocks show their size and percentage of their parent folder.

First stable release. The snapshot format (version 1) is now stable: later 1.x releases will keep reading version 1 snapshots.

Bounded concurrent scanner with incremental aggregation, cancellation, hard-link and symlink-loop handling, error accounting.
Non-interactive reports: --top, --largest-files, --json, --csv, --duplicates, --no-ui.
Versioned, checksummed snapshot format; --compare.

Interactive TUI (Bubble Tea v2): live squarified treemap with nested previews and level-of-detail grouping, spatial arrow navigation, zoom, breadcrumbs, responsive layouts, info/help/confirm/save modals, mouse.
Views: directory list, file types, top lists, scan info & errors, duplicates, snapshot changes.
Search/filter language with live treemap filtering.
Themes (default, dark, high-contrast, mono), --color override, perceptual 256-colour quantizer, NO_COLOR support.
Move to trash (freedesktop / macOS / Windows), --read-only.
treegen synthetic tree generator; benchmarks in PERFORMANCE.md.

mapsize(1) manual page; make install installs binary and man page.
make release: archives for Linux, macOS, Windows and the BSDs, plus .deb, .rpm, .apk and Arch packages (with the man page) and SHA256SUMS.
Version stamped into release builds.
Homebrew formula template and make brew-formula.

Snapshot loader rejects over-deep trees, decompression bombs and out-of-range sizes; aggregates saturate instead of overflowing.
Exclusion patterns from snapshot metadata are sanitised in reports.
Duplicate, trash and filter results belonging to a replaced tree (after a rescan) are discarded.
Linux trash refuses symlinked or foreign trash directories on shared filesystems and never overwrites an earlier trashed item.
Symlinks are not followed on platforms without inode identity; the unscanned-directory count and post-cancel errors are reported correctly.
Path filters evaluate incrementally (2× faster on 1M entries).