chore: update benchmarks and add @cantoo/pdf-lib for comparison

[Mythie]

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Project	Deployment	Actions	Updated (UTC)
core	Ready	Preview, Comment	Mar 11, 2026 2:27am

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Benchmark Results

Comparison

Load PDF

Benchmark	Mean	p99	RME	Samples
libpdf	2.50ms	4.08ms	±2.6%	200
pdf-lib	40.13ms	45.76ms	±4.0%	13
@cantoo/pdf-lib	39.39ms	45.98ms	±4.0%	13

Create blank PDF

Benchmark	Mean	p99	RME	Samples
libpdf	56μs	126μs	±1.5%	8882
pdf-lib	418μs	1.53ms	±2.5%	1198
@cantoo/pdf-lib	449μs	1.78ms	±2.8%	1113

Add 10 pages

Benchmark	Mean	p99	RME	Samples
libpdf	99μs	163μs	±1.3%	5040
pdf-lib	557μs	2.23ms	±3.3%	899
@cantoo/pdf-lib	505μs	2.61ms	±3.7%	991

Draw 50 rectangles

Benchmark	Mean	p99	RME	Samples
libpdf	342μs	927μs	±1.8%	1462
pdf-lib	1.79ms	7.59ms	±7.4%	279
@cantoo/pdf-lib	2.04ms	5.95ms	±5.9%	246

Load and save PDF

Benchmark	Mean	p99	RME	Samples
libpdf	2.55ms	4.25ms	±3.0%	197
pdf-lib	86.84ms	98.43ms	±4.5%	10
@cantoo/pdf-lib	155.57ms	161.57ms	±2.0%	10

Load, modify, and save PDF

Benchmark	Mean	p99	RME	Samples
libpdf	43.07ms	56.55ms	±7.3%	12
pdf-lib	93.50ms	118.17ms	±9.1%	10
@cantoo/pdf-lib	155.03ms	162.85ms	±1.8%	10

Extract single page from 100-page PDF

Benchmark	Mean	p99	RME	Samples
libpdf	3.66ms	4.39ms	±1.5%	137
pdf-lib	9.21ms	11.70ms	±2.1%	55
@cantoo/pdf-lib	9.83ms	14.98ms	±3.3%	51

Split 100-page PDF into single-page PDFs

Benchmark	Mean	p99	RME	Samples
libpdf	33.65ms	37.68ms	±2.2%	15
pdf-lib	86.28ms	92.86ms	±4.3%	6
@cantoo/pdf-lib	93.60ms	95.55ms	±1.7%	6

Split 2000-page PDF into single-page PDFs (0.9MB)

Benchmark	Mean	p99	RME	Samples
libpdf	627.75ms	627.75ms	±0.0%	1
pdf-lib	1.65s	1.65s	±0.0%	1
@cantoo/pdf-lib	1.69s	1.69s	±0.0%	1

Copy 10 pages between documents

Benchmark	Mean	p99	RME	Samples
libpdf	4.53ms	5.67ms	±1.2%	111
pdf-lib	11.89ms	12.81ms	±1.3%	43
@cantoo/pdf-lib	13.51ms	14.97ms	±2.0%	37

Merge 2 x 100-page PDFs

Benchmark	Mean	p99	RME	Samples
libpdf	14.24ms	16.41ms	±1.6%	36
pdf-lib	53.03ms	53.72ms	±0.5%	10
@cantoo/pdf-lib	63.05ms	65.36ms	±2.0%	8

Fill FINTRAC form fields

Benchmark	Mean	p99	RME	Samples
libpdf	19.84ms	22.71ms	±3.2%	26
pdf-lib	33.89ms	43.37ms	±4.9%	15
@cantoo/pdf-lib	36.07ms	55.87ms	±10.2%	14

Fill and flatten FINTRAC form

Benchmark	Mean	p99	RME	Samples
libpdf	20.18ms	33.50ms	±7.4%	25
pdf-lib	FAILED	-	-	0
@cantoo/pdf-lib	40.15ms	46.30ms	±5.7%	13

Copying

Copy pages between documents

Benchmark	Mean	p99	RME	Samples
copy 1 page	1.05ms	2.41ms	±3.8%	478
copy 10 pages from 100-page PDF	4.56ms	8.35ms	±3.3%	110
copy all 100 pages	7.16ms	7.82ms	±0.9%	70

Duplicate pages within same document

Benchmark	Mean	p99	RME	Samples
duplicate page 0	868μs	1.58ms	±1.1%	576
duplicate all pages (double the document)	886μs	1.80ms	±1.6%	565

Merge PDFs

Benchmark	Mean	p99	RME	Samples
merge 2 small PDFs	1.42ms	2.10ms	±1.2%	353
merge 10 small PDFs	7.34ms	8.34ms	±1.0%	69
merge 2 x 100-page PDFs	13.12ms	16.43ms	±1.5%	39

Drawing

benchmarks/drawing.bench.ts

Benchmark	Mean	p99	RME	Samples
draw 100 rectangles	595μs	1.46ms	±3.2%	840
draw 100 circles	1.27ms	3.09ms	±2.9%	395
draw 100 lines	510μs	1.21ms	±1.6%	980
draw 100 text lines (standard font)	1.59ms	2.52ms	±1.5%	316
create 10 pages with mixed content	1.35ms	2.28ms	±1.7%	372

Forms

benchmarks/forms.bench.ts

Benchmark	Mean	p99	RME	Samples
get form fields	3.36ms	7.84ms	±5.1%	149
fill text fields	11.95ms	17.62ms	±4.9%	43
read field values	2.95ms	4.70ms	±1.5%	170
flatten form	8.16ms	10.94ms	±2.2%	62

Loading

benchmarks/loading.bench.ts

Benchmark	Mean	p99	RME	Samples
load small PDF (888B)	61μs	148μs	±0.9%	8226
load medium PDF (19KB)	96μs	181μs	±0.6%	5225
load form PDF (116KB)	1.34ms	2.44ms	±1.6%	373
load heavy PDF (9.9MB)	2.42ms	3.01ms	±1.0%	207

Saving

benchmarks/saving.bench.ts

Benchmark	Mean	p99	RME	Samples
save unmodified (19KB)	119μs	282μs	±2.7%	4207
save with modifications (19KB)	793μs	2.06ms	±2.2%	631
incremental save (19KB)	179μs	356μs	±2.2%	2796
save heavy PDF (9.9MB)	2.57ms	3.97ms	±1.8%	195
incremental save heavy PDF (9.9MB)	8.69ms	10.27ms	±3.2%	58

Splitting

Extract single page

Benchmark	Mean	p99	RME	Samples
extractPages (1 page from small PDF)	1.01ms	2.40ms	±3.0%	494
extractPages (1 page from 100-page PDF)	3.54ms	4.75ms	±1.4%	142
extractPages (1 page from 2000-page PDF)	56.36ms	57.28ms	±0.5%	10

Split into single-page PDFs

Benchmark	Mean	p99	RME	Samples
split 100-page PDF (0.1MB)	32.30ms	36.69ms	±4.1%	16
split 2000-page PDF (0.9MB)	581.96ms	581.96ms	±0.0%	1

Batch page extraction

Benchmark	Mean	p99	RME	Samples
extract first 10 pages from 2000-page PDF	58.90ms	61.45ms	±1.7%	9
extract first 100 pages from 2000-page PDF	61.47ms	63.99ms	±1.6%	9
extract every 10th page from 2000-page PDF (200 pages)	66.52ms	67.46ms	±1.1%	8

Environment

• Runner: Linux (X64)
• Runtime: Bun 1.3.10

Results are machine-dependent.