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perf(hash): swap std HashMap/HashSet for rustc-hash FxHash

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Phase 4.1. Handle / u64 keys dominate the hot maps (block_defn,
hatch / image / mesh caches, draw-depth map, viewport wire caches);
the default SipHash is wasted work on integer keys. Alias the std
types to rustc_hash::FxHashMap / FxHashSet crate-wide so every map and
set — including the cross-module draw-depth map shared between scene
and the GPU pipelines — uses the faster hasher consistently.

Mechanical: no behavioural change. Constructors moved from ::new() to
::default() (Fx variants carry no RandomState). Build + 13 tests green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-06-05 00:35:53 +03:00
commit 70702d063f
30 changed files with 102 additions and 98 deletions
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6
src/snap/mod.rs
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@ -63,7 +63,7 @@ pub struct SnapResult {
// ── Snapper ───────────────────────────────────────────────────────────────
use std::collections::HashSet;
use rustc_hash::FxHashSet as HashSet;
pub struct Snapper {
/// Global snap on/off toggle. When false, all snapping is bypassed
@ -87,7 +87,7 @@ pub struct Snapper {
impl Default for Snapper {
fn default() -> Self {
let mut enabled = HashSet::new();
let mut enabled = HashSet::default();
enabled.insert(SnapType::Endpoint);
enabled.insert(SnapType::Midpoint);
enabled.insert(SnapType::Center);
@ -257,7 +257,7 @@ impl Snapper {
let tmp = Snapper {
snap_enabled: true,
enabled: {
let mut s = HashSet::new();
let mut s = HashSet::default();
s.insert(SnapType::Tangent);
s
},