Bloaty Analysis: libazul.dylib

Binary: /Users/fschutt/Development/azul/target/release/libazul.dylib Build: Release with debug symbols Total size: 27.2 MB Analysis date: 2026-02-26

---

Section Breakdown

Size	%	Section
11.6 MB	42.5%	__TEXT,__text (code)
7.18 MB	26.4%	__TEXT,__const (constants/data)
3.19 MB	11.7%	String Table
3.04 MB	11.2%	Symbol Table
1.46 MB	5.3%	__DATA_CONST,__const
216 KB	0.8%	Code Signature
212 KB	0.8%	Export Info
135 KB	0.5%	__TEXT,__cstring

---

Top Anonymous Constants (Largest Data Blobs)

Size	Symbol	Identified as
2.77 MB	_anon.66787c…	ICU segmenter dictionaries — Thai/Burmese/CJK word-break data from icu_segmenter_data
917 KB	_anon.798763…	encoding_rs charset lookup tables
650 KB	_anon.4faf4e…	Azul debug server embedded HTML/CSS/JS strings (E2E test routes)
499 KB	_anon.b005ec…	ICU locale blob from icu_provider_blob (root locale "und")
372 KB	_anon.77f5508…874	regex_automata compiled DFA tables
307 KB	_anon.eed79d…	Unknown (likely more encoding/regex data)
299 KB	_anon.c36a09…	More debug server strings ("Bad datastore lookup", etc.)
228 KB	_anon.77f5508…742	More regex_automata NFA tables
148 KB	_ecp_nistz256_precomputed	ring crypto — P-256 ECDH precomputed table
119 KB	brotli_decompressor::dictionary::kBrotliDictionary	Brotli decompression dictionary

ICU total: ~3.27 MB (2.77 MB segmenter + 499 KB locale blob) regex tables total: ~600 KB Debug server embedded strings: ~950 KB

---

Top Named Code Symbols

Size	Symbol
67.9 KB	azul::desktop::shell2::common::debug_server::process_debug_event
67.3 KB	azul::desktop::shell2::macos::gl::GlFunctions::initialize
67.2 KB	taffy::compute::grid::track_sizing::resolve_intrinsic_track_sizes
56.6 KB	azul_css::CssProperty::clone
52.2 KB	azul_layout::widgets::text_input::TEXT_INPUT_CONTAINER_PROPS
41.0 KB	webrender::renderer::Renderer::draw_frame
36.9 KB	encoding_rs::data::BIG5_LOW_BITS
23.1 KB	debug server ExportedLibraryResponse deserialize visitor

---

Dependency Rlib Sizes (unstripped, from target/release/deps/)

These are pre-monomorphization .rlib sizes; actual contribution to the binary is smaller.

rlib	Size
libazul_layout	131.4 MB
libobjc2_app_kit	129.7 MB
libazul	119.0 MB
libobjc2_foundation	62.5 MB
libwebrender	60.8 MB
libazul_core	55.2 MB
libazul_css	39.5 MB
libicu_datetime	36.7 MB
liballsorts	32.8 MB
libimage	28.3 MB
libmoxcms	23.4 MB
librustls	21.3 MB
libicu_datetime_data	20.3 MB
libicu_segmenter	15.8 MB
libregex_automata	15.7 MB
librust_fontconfig	13.4 MB
libregex_syntax	13.1 MB
libwebrender_api	12.0 MB
libicu_segmenter_data	11.9 MB
libpxfm	9.96 MB

---

Optimization Opportunities

High Priority

1. ICU — ~3.3 MB

• icu_segmenter_data (2.77 MB) + icu_provider_blob (499 KB)
• Fix: New icu_macos feature uses NSNumberFormatter / NSDateFormatter / NSListFormatter / NSString.localizedCompare: instead of bundling ICU4X data blobs. Plural rules use a compact hardcoded CLDR lookup table. build-dll now uses "icu_macos" instead of "icu".
• Status: Done — layout/src/icu_macos.rs + cfg-gated icu.rs

2. regex — ~600 KB

• regex_automata DFA/NFA tables compiled for 4 trivial patterns used only in try_wlr_randr() in dll/src/desktop/display.rs
• Fix: Replace 4 regex patterns with string parsing; remove regex dep
• Status: Done (see PR/commit)

---

Medium Priority

3. WebP / moxcms / pxfm — rlib overhead

• Dependency chain: image (webp feature) → image-webp v0.2.4 → moxcms v0.7.9 → pxfm v0.1.25
• libmoxcms is 23.4 MB rlib, libpxfm is 9.96 MB rlib
• Fix: Remove webp from all_img_formats or from build-dll defaults
• Risk: WebP is a commonly expected image format; may break apps that use it
• Status: Under investigation

4. backtrace — small

• backtrace = { version = "0.3.66", optional = true } is enabled by build-dll and link-static
• Not useful in release builds without debug info parsing
• Fix: Remove from build-dll/link-static; enable only in dev profile or behind a feature flag
• Status: Not yet done

5. Debug server (spmc, strum) — small

• spmc provides an SPMC channel used exclusively in debug_server.rs for timer→window thread communication
• strum used in debug_server.rs for enum iteration over DebugRequest variants (also used in azul-css so can't fully remove)
• Fix: Gate the debug server behind an optional feature (e.g., debug-server); spmc goes away completely
• Status: Not yet done

---

Low Priority / Keep

6. tfd (tiny-file-dialogs)

• Native file open/save dialogs on all platforms
• Deeply integrated; removing would break file dialog API
• Decision: Keep

7. ICU (alternative) — localization/date formatting

• icu is pulled in by azul-layout for proper Unicode segmentation, date formatting, etc.
• Decision: Keep as opt-in feature; do NOT include in default build-dll

---

Summary Table

Item	Actual binary impact	Action	Status
ICU segmenter + locale data	~3.3 MB	macOS Foundation backend (icu_macos)	Done
regex tables	~600 KB	Replace with string ops	Done
moxcms + pxfm (WebP)	significant rlib overhead	Investigate removing webp from defaults	TODO
backtrace	small	Gate to dev-only	TODO
spmc / debug server	small	Optional feature gate	TODO