HQ Path QEMU Size Report

• Commit: 1fe189eb

• Date: 2026-05-21T16:01:31.525244

• Build target: APP=HelloSizeAnalysis APP_SUB=hq_path_probe PORT=qemu CPU_ARCH=cortex-m0plus

• Measurement method: build HelloSizeAnalysis/hq_path_probe baseline, then rewrite the app-local probe config header to force-link a single HQ path into the final ELF.

• Report scope: isolated static link delta only. This report does not include runtime heap/stack because the HQ geometry paths themselves do not allocate heap.

How To Read

• Delta Text: .text increment relative to baseline, used as the main code-size number.

• Delta Rodata: extra lookup tables / constants brought in by the HQ path.

• Delta ROM: .text + .rodata total flash increment relative to baseline.

• ARC_HQ here measures egui_canvas_draw_arc_hq() + egui_canvas_draw_arc_fill_hq() only.

• ARC_ROUND_CAP_HQ is listed separately because it is a real widget-facing helper and it pulls both arc and circle-fill dependencies.

• Delta ROM is the real ELF section delta. It is often larger than the listed public symbol sizes because static helpers and dependent sections are linked too.

• The +8 BSS seen in probe variants comes from the probe harness guard in HelloSizeAnalysis/hq_path_probe, not from persistent HQ runtime state.

• Turning a path off can only reclaim the same bytes when no other object still references that path.

Baseline

Variant	Text	Rodata	Data	Bss	Total ROM
Baseline	27032	7504	1392	6612	34536

Increment Summary

Path	Delta Text	Delta Rodata	Delta Data	Delta Bss	Delta ROM
LINE_HQ	+12396	+68	+0	+4	+12464
CIRCLE_HQ	+2828	+36	+0	+4	+2864
ARC_HQ	+8372	+764	+0	+4	+9136
ARC_ROUND_CAP_HQ	+10640	+804	+0	+4	+11444
ALL_HQ	+20988	+796	+0	+4	+21784

Detailed Variants

Variant	Probe Config	Text	Rodata	Data	Bss	Total ROM
Baseline	(none)	27032	7504	1392	6612	34536
LINE_HQ	-DEGUI_SIZE_PROBE_LINK_LINE_HQ=1	39428	7572	1392	6616	47000
CIRCLE_HQ	-DEGUI_SIZE_PROBE_LINK_CIRCLE_HQ=1	29860	7540	1392	6616	37400
ARC_HQ	-DEGUI_SIZE_PROBE_LINK_ARC_HQ=1	35404	8268	1392	6616	43672
ARC_ROUND_CAP_HQ	-DEGUI_SIZE_PROBE_LINK_ARC_ROUND_CAP_HQ=1	37672	8308	1392	6616	45980
ALL_HQ	-DEGUI_SIZE_PROBE_LINK_LINE_HQ=1 -DEGUI_SIZE_PROBE_LINK_CIRCLE_HQ=1 -DEGUI_SIZE_PROBE_LINK_ARC_HQ=1	48020	8300	1392	6616	56320

Linked Symbol Breakdown

LINE_HQ

• Description: Force link the line/polyline HQ path only.

• Symbol text total: 3636 bytes

Symbol	Size (bytes)	Type
egui_canvas_draw_line_hq	2024	T
egui_canvas_draw_line_round_cap_hq	1552	T
egui_canvas_draw_polyline_hq	30	T
egui_canvas_draw_polyline_round_cap_hq	30	T

CIRCLE_HQ

• Description: Force link the circle HQ path only.

• Symbol text total: 2708 bytes

Symbol	Size (bytes)	Type
egui_canvas_draw_circle_fill_hq	1744	T
egui_canvas_draw_circle_hq	964	T

ARC_HQ

• Description: Force link the arc HQ path only. Round-cap arc is excluded to avoid double counting line/circle dependencies.

• Symbol text total: 1132 bytes

Symbol	Size (bytes)	Type
egui_canvas_draw_arc_fill_hq	624	T
egui_canvas_draw_arc_hq	508	T

ARC_ROUND_CAP_HQ

• Description: Force link the round-cap arc helper used by widgets like activity_ring.

• Symbol text total: 2668 bytes

Symbol	Size (bytes)	Type
egui_canvas_draw_circle_fill_hq	1744	T
egui_canvas_draw_arc_hq	508	T
egui_canvas_draw_arc_round_cap_hq	416	T

ALL_HQ

• Description: Force link the three core HQ paths together.

• Symbol text total: 7476 bytes

Symbol	Size (bytes)	Type
egui_canvas_draw_line_hq	2024	T
egui_canvas_draw_circle_fill_hq	1744	T
egui_canvas_draw_line_round_cap_hq	1552	T
egui_canvas_draw_circle_hq	964	T
egui_canvas_draw_arc_fill_hq	624	T
egui_canvas_draw_arc_hq	508	T
egui_canvas_draw_polyline_hq	30	T
egui_canvas_draw_polyline_round_cap_hq	30	T

Reproduce

python scripts/size_analysis/main.py hq-size-to-doc

The raw JSON is written to output/hq_size_results.json.