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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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20
src/app/commands.rs
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@ -118,7 +118,7 @@ impl OpenCADStudio {
self.command_line.push_info(&cmd.prompt());
self.tabs[i].active_cmd = Some(Box::new(cmd));
} else {
let layers: std::collections::HashSet<String> = self.tabs[i]
let layers: rustc_hash::FxHashSet<String> = self.tabs[i]
.scene
.selected_entities()
.into_iter()
@ -153,7 +153,7 @@ impl OpenCADStudio {
self.command_line.push_info(&cmd.prompt());
self.tabs[i].active_cmd = Some(Box::new(cmd));
} else {
let layers: std::collections::HashSet<String> = self.tabs[i]
let layers: rustc_hash::FxHashSet<String> = self.tabs[i]
.scene
.selected_entities()
.into_iter()
@ -188,7 +188,7 @@ impl OpenCADStudio {
self.command_line.push_info(&cmd.prompt());
self.tabs[i].active_cmd = Some(Box::new(cmd));
} else {
let layers: std::collections::HashSet<String> = self.tabs[i]
let layers: rustc_hash::FxHashSet<String> = self.tabs[i]
.scene
.selected_entities()
.into_iter()
@ -278,7 +278,7 @@ impl OpenCADStudio {
self.command_line.push_info(&cmd.prompt());
self.tabs[i].active_cmd = Some(Box::new(cmd));
} else {
let layers: std::collections::HashSet<String> = self.tabs[i]
let layers: rustc_hash::FxHashSet<String> = self.tabs[i]
.scene
.selected_entities()
.into_iter()
@ -299,7 +299,7 @@ impl OpenCADStudio {
// LAYISO — turn off all layers except those used by selected entities
"LAYISO" => {
let sel_layers: std::collections::HashSet<String> = self.tabs[i]
let sel_layers: rustc_hash::FxHashSet<String> = self.tabs[i]
.scene
.selected_entities()
.into_iter()
@ -3090,10 +3090,10 @@ impl OpenCADStudio {
// including ones not yet in the table, which sort by
// their own handle. (min_eff, max_eff) over siblings.
let fb_baseline: Option<(u64, u64)> = if to_front_opt.is_some() {
let selected_set: std::collections::HashSet<u64> =
let selected_set: rustc_hash::FxHashSet<u64> =
selected.iter().map(|h| h.value()).collect();
let doc_ref = &self.tabs[i].scene.document;
let overrides: std::collections::HashMap<u64, u64> = doc_ref
let overrides: rustc_hash::FxHashMap<u64, u64> = doc_ref
.objects
.values()
.find_map(|obj| {
@ -4358,7 +4358,7 @@ impl OpenCADStudio {
let all = sub == "ALL" || sub.is_empty();
// Collect names in use (immutable borrows — done in their own scope)
let used_layers: std::collections::HashSet<String> = self.tabs[i]
let used_layers: rustc_hash::FxHashSet<String> = self.tabs[i]
.scene
.document
.entities()
@ -4371,7 +4371,7 @@ impl OpenCADStudio {
}
})
.collect();
let used_text_styles: std::collections::HashSet<String> = self.tabs[i]
let used_text_styles: rustc_hash::FxHashSet<String> = self.tabs[i]
.scene
.document
.entities()
@ -4382,7 +4382,7 @@ impl OpenCADStudio {
})
.filter(|s| !s.is_empty())
.collect();
let used_linetypes: std::collections::HashSet<String> = self.tabs[i]
let used_linetypes: rustc_hash::FxHashSet<String> = self.tabs[i]
.scene
.document
.entities()