shergin/malevich v1.17.0

1.17.0 (The Carpenter)

on GitHub

A code-quality release: invalid retained data now reaches one checked boundary,
the hottest statistical and rendering paths carry less incidental structure, and
the cell, pixel, and CLI front ends prepare a chart once. The public API remains
compatible; new checked twins make the remaining convenience assertions avoidable.

• Cells::try_matrix and Cells::try_extents expose typed failures for invalid
  matrix geometry and extents. Configured histogram, heatmap, and 2D-histogram
  presets use those checked paths end to end, while their infallible conveniences
  still degrade safely for trusted literals.
• Finite-range arithmetic is overflow-safe, calendar tick generation has an
  explicit work budget, and retained mark values share one validity policy. These
  close hangs and pathological allocations around enormous finite domains without
  changing ordinary axes or plots.
• M4 downsampling preserves gaps as path topology, including gaps between buckets
  and across merged chunks. Its streaming state, tests, and merge contract now say
  exactly when ordered partial reductions are equivalent to one pass. The ordinary
  affine map is selected once and each bucket updates its current run directly;
  ten million points now render in 31.9 ms on the recorded machine, 5.9% below 1.16.
• Reducers compile once into execution state. Sum, count, mean, min, and max stream
  in constant space; rolling sum and mean use their specialized sliding state;
  percentile-like reducers retain only the samples they require. Aggregation keys
  are interned in stable first-seen order, and KDE reuses moments and sample storage.
• Categorical channels are interned once per mark and rendered directly. They no
  longer expand into one masked layer per category, while stable legend order,
  palette assignment, marker cycling, line transitions, and category-aware M4
  retain the prior output contract.
• Cell and device-pixel rendering share one prepared plot. The CLI likewise shares
  one typed recipe and one set of parsed series channels between rendering and
  --emit-code, removing duplicate resolution and keeping both outputs in lockstep.
• Invalid civil timestamps and out-of-range numeric column selectors are rejected
  with actionable CLI errors. CI now builds and tests both demo crates, terminal
  dependency versions are aligned, and the public failure and statistical execution
  models are documented explicitly.

Also released: malevich-cli 0.2.1
(kaz, tag cli-v0.2.1). It now rejects invalid numeric selectors and civil
timestamps, shares one prepared recipe between rendering and --emit-code, reuses
parsed channels, and propagates checked preset failures as normal CLI errors.

Full changelog: CHANGELOG.md ·
crates.io: malevich 1.17.0 ·
benchmarks: BENCHMARKS.md