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‎reports/benchmarks.md‎

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# Benchmark Report
22

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> Generated on 2026-02-23 at 22:30:04 UTC
3+
> Generated on 2026-02-28 at 10:28:05 UTC
44
>
5-
> System: linux | AMD EPYC 7763 64-Core Processor (4 cores) | 16GB RAM | Bun 1.3.9
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> System: linux | AMD EPYC 7763 64-Core Processor (4 cores) | 16GB RAM | Bun 1.3.10
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@@ -22,222 +22,222 @@
2222

2323
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
2424
| :-------- | ------: | ------: | ------: | -----: | ------: |
25-
| libpdf | 432.4 | 2.31ms | 3.21ms | ±1.41% | 217 |
26-
| pdf-lib | 26.7 | 37.41ms | 42.25ms | ±3.56% | 14 |
25+
| libpdf | 428.7 | 2.33ms | 4.17ms | ±1.83% | 215 |
26+
| pdf-lib | 26.3 | 38.03ms | 44.94ms | ±3.54% | 14 |
2727

28-
- **libpdf** is 16.17x faster than pdf-lib
28+
- **libpdf** is 16.30x faster than pdf-lib
2929

3030
### Create blank PDF
3131

3232
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
3333
| :-------- | ------: | ----: | -----: | -----: | ------: |
34-
| libpdf | 17.6K | 57us | 125us | ±2.63% | 8,817 |
35-
| pdf-lib | 2.4K | 410us | 1.26ms | ±2.20% | 1,219 |
34+
| libpdf | 18.2K | 55us | 112us | ±1.45% | 9,113 |
35+
| pdf-lib | 2.3K | 439us | 1.49ms | ±2.27% | 1,139 |
3636

37-
- **libpdf** is 7.23x faster than pdf-lib
37+
- **libpdf** is 8.01x faster than pdf-lib
3838

3939
### Add 10 pages
4040

4141
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
4242
| :-------- | ------: | ----: | -----: | -----: | ------: |
43-
| libpdf | 10.5K | 96us | 149us | ±0.83% | 5,228 |
44-
| pdf-lib | 2.0K | 499us | 1.65ms | ±2.52% | 1,003 |
43+
| libpdf | 9.9K | 101us | 188us | ±1.24% | 4,968 |
44+
| pdf-lib | 1.9K | 513us | 1.86ms | ±2.81% | 974 |
4545

46-
- **libpdf** is 5.21x faster than pdf-lib
46+
- **libpdf** is 5.10x faster than pdf-lib
4747

4848
### Draw 50 rectangles
4949

5050
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
5151
| :-------- | ------: | -----: | -----: | -----: | ------: |
52-
| libpdf | 3.3K | 307us | 755us | ±1.26% | 1,632 |
53-
| pdf-lib | 569.7 | 1.76ms | 7.25ms | ±6.85% | 285 |
52+
| libpdf | 3.2K | 309us | 717us | ±1.25% | 1,619 |
53+
| pdf-lib | 593.1 | 1.69ms | 6.64ms | ±6.54% | 297 |
5454

55-
- **libpdf** is 5.73x faster than pdf-lib
55+
- **libpdf** is 5.46x faster than pdf-lib
5656

5757
### Load and save PDF
5858

59-
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
60-
| :-------- | ------: | ------: | ------: | -----: | ------: |
61-
| libpdf | 406.5 | 2.46ms | 4.26ms | ±2.28% | 204 |
62-
| pdf-lib | 11.5 | 86.80ms | 94.86ms | ±4.33% | 10 |
59+
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
60+
| :-------- | ------: | ------: | -------: | -----: | ------: |
61+
| libpdf | 426.5 | 2.34ms | 3.04ms | ±1.34% | 214 |
62+
| pdf-lib | 11.4 | 87.87ms | 100.64ms | ±5.53% | 10 |
6363

64-
- **libpdf** is 35.28x faster than pdf-lib
64+
- **libpdf** is 37.48x faster than pdf-lib
6565

6666
### Load, modify, and save PDF
6767

68-
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
69-
| :-------- | ------: | ------: | ------: | -----: | ------: |
70-
| libpdf | 23.6 | 42.40ms | 45.95ms | ±3.71% | 12 |
71-
| pdf-lib | 11.6 | 86.33ms | 90.84ms | ±2.78% | 10 |
68+
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
69+
| :-------- | ------: | ------: | -------: | -----: | ------: |
70+
| libpdf | 24.2 | 41.26ms | 48.26ms | ±3.34% | 13 |
71+
| pdf-lib | 11.1 | 90.09ms | 107.48ms | ±6.55% | 10 |
7272

73-
- **libpdf** is 2.04x faster than pdf-lib
73+
- **libpdf** is 2.18x faster than pdf-lib
7474

7575
### Extract single page from 100-page PDF
7676

7777
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
7878
| :-------- | ------: | -----: | ------: | -----: | ------: |
79-
| libpdf | 276.6 | 3.62ms | 6.35ms | ±2.01% | 139 |
80-
| pdf-lib | 112.4 | 8.90ms | 11.73ms | ±1.66% | 57 |
79+
| libpdf | 269.4 | 3.71ms | 6.30ms | ±1.85% | 135 |
80+
| pdf-lib | 109.1 | 9.17ms | 10.99ms | ±1.59% | 55 |
8181

82-
- **libpdf** is 2.46x faster than pdf-lib
82+
- **libpdf** is 2.47x faster than pdf-lib
8383

8484
### Split 100-page PDF into single-page PDFs
8585

8686
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
8787
| :-------- | ------: | ------: | ------: | -----: | ------: |
88-
| libpdf | 31.5 | 31.77ms | 34.01ms | ±1.81% | 16 |
89-
| pdf-lib | 11.2 | 89.29ms | 99.64ms | ±6.63% | 6 |
88+
| libpdf | 30.4 | 32.87ms | 38.58ms | ±2.86% | 16 |
89+
| pdf-lib | 11.5 | 87.05ms | 92.25ms | ±4.07% | 6 |
9090

91-
- **libpdf** is 2.81x faster than pdf-lib
91+
- **libpdf** is 2.65x faster than pdf-lib
9292

9393
### Split 2000-page PDF into single-page PDFs (0.9MB)
9494

9595
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
9696
| :-------- | ------: | -------: | -------: | -----: | ------: |
97-
| libpdf | 1.7 | 600.72ms | 600.72ms | ±0.00% | 1 |
98-
| pdf-lib | 0.622 | 1.61s | 1.61s | ±0.00% | 1 |
97+
| libpdf | 1.7 | 599.88ms | 599.88ms | ±0.00% | 1 |
98+
| pdf-lib | 0.610 | 1.64s | 1.64s | ±0.00% | 1 |
9999

100-
- **libpdf** is 2.68x faster than pdf-lib
100+
- **libpdf** is 2.73x faster than pdf-lib
101101

102102
### Copy 10 pages between documents
103103

104104
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
105105
| :-------- | ------: | ------: | ------: | -----: | ------: |
106-
| libpdf | 223.5 | 4.47ms | 5.06ms | ±0.82% | 112 |
107-
| pdf-lib | 86.0 | 11.63ms | 13.78ms | ±1.40% | 43 |
106+
| libpdf | 219.4 | 4.56ms | 5.30ms | ±0.97% | 110 |
107+
| pdf-lib | 84.5 | 11.83ms | 13.07ms | ±1.23% | 43 |
108108

109109
- **libpdf** is 2.60x faster than pdf-lib
110110

111111
### Merge 2 x 100-page PDFs
112112

113113
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
114114
| :-------- | ------: | ------: | ------: | -----: | ------: |
115-
| libpdf | 73.4 | 13.63ms | 15.68ms | ±1.31% | 37 |
116-
| pdf-lib | 19.2 | 52.05ms | 52.75ms | ±0.68% | 10 |
115+
| libpdf | 71.1 | 14.07ms | 19.31ms | ±2.33% | 36 |
116+
| pdf-lib | 18.8 | 53.26ms | 54.75ms | ±0.81% | 10 |
117117

118-
- **libpdf** is 3.82x faster than pdf-lib
118+
- **libpdf** is 3.79x faster than pdf-lib
119119

120120
## Copying
121121

122122
### Copy pages between documents
123123

124124
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
125125
| :------------------------------ | ------: | -----: | -----: | -----: | ------: |
126-
| copy 1 page | 1.0K | 988us | 1.95ms | ±2.30% | 506 |
127-
| copy 10 pages from 100-page PDF | 222.5 | 4.49ms | 6.52ms | ±1.94% | 112 |
128-
| copy all 100 pages | 137.4 | 7.28ms | 8.10ms | ±0.84% | 69 |
126+
| copy 1 page | 999.6 | 1.00ms | 2.07ms | ±2.57% | 500 |
127+
| copy 10 pages from 100-page PDF | 221.9 | 4.51ms | 5.39ms | ±1.34% | 111 |
128+
| copy all 100 pages | 135.0 | 7.41ms | 7.81ms | ±0.58% | 68 |
129129

130-
- **copy 1 page** is 4.55x faster than copy 10 pages from 100-page PDF
131-
- **copy 1 page** is 7.37x faster than copy all 100 pages
130+
- **copy 1 page** is 4.50x faster than copy 10 pages from 100-page PDF
131+
- **copy 1 page** is 7.40x faster than copy all 100 pages
132132

133133
### Duplicate pages within same document
134134

135135
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
136136
| :---------------------------------------- | ------: | ----: | -----: | -----: | ------: |
137-
| duplicate all pages (double the document) | 1.2K | 867us | 1.59ms | ±0.98% | 577 |
138-
| duplicate page 0 | 1.1K | 876us | 1.62ms | ±1.06% | 571 |
137+
| duplicate all pages (double the document) | 1.1K | 879us | 1.39ms | ±0.90% | 569 |
138+
| duplicate page 0 | 1.1K | 893us | 1.39ms | ±0.99% | 560 |
139139

140-
- **duplicate all pages (double the document)** is 1.01x faster than duplicate page 0
140+
- **duplicate all pages (double the document)** is 1.02x faster than duplicate page 0
141141

142142
### Merge PDFs
143143

144144
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
145145
| :---------------------- | ------: | ------: | ------: | -----: | ------: |
146-
| merge 2 small PDFs | 701.3 | 1.43ms | 2.05ms | ±1.07% | 351 |
147-
| merge 10 small PDFs | 135.2 | 7.40ms | 8.10ms | ±0.77% | 68 |
148-
| merge 2 x 100-page PDFs | 73.9 | 13.54ms | 15.99ms | ±1.29% | 37 |
146+
| merge 2 small PDFs | 686.7 | 1.46ms | 2.66ms | ±1.35% | 344 |
147+
| merge 10 small PDFs | 134.4 | 7.44ms | 7.95ms | ±0.75% | 68 |
148+
| merge 2 x 100-page PDFs | 73.7 | 13.57ms | 13.95ms | ±0.69% | 37 |
149149

150-
- **merge 2 small PDFs** is 5.19x faster than merge 10 small PDFs
151-
- **merge 2 small PDFs** is 9.49x faster than merge 2 x 100-page PDFs
150+
- **merge 2 small PDFs** is 5.11x faster than merge 10 small PDFs
151+
- **merge 2 small PDFs** is 9.32x faster than merge 2 x 100-page PDFs
152152

153153
## Drawing
154154

155155
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
156156
| :---------------------------------- | ------: | -----: | -----: | -----: | ------: |
157-
| draw 100 lines | 2.0K | 488us | 1.11ms | ±1.28% | 1,025 |
158-
| draw 100 rectangles | 1.8K | 566us | 1.44ms | ±3.15% | 884 |
159-
| create 10 pages with mixed content | 753.5 | 1.33ms | 2.21ms | ±1.57% | 377 |
160-
| draw 100 circles | 738.8 | 1.35ms | 2.93ms | ±3.15% | 370 |
161-
| draw 100 text lines (standard font) | 643.9 | 1.55ms | 2.23ms | ±1.27% | 322 |
157+
| draw 100 lines | 2.0K | 492us | 1.11ms | ±1.34% | 1,017 |
158+
| draw 100 rectangles | 1.8K | 565us | 1.32ms | ±2.13% | 885 |
159+
| draw 100 circles | 785.6 | 1.27ms | 2.79ms | ±2.50% | 393 |
160+
| create 10 pages with mixed content | 751.7 | 1.33ms | 2.25ms | ±1.69% | 376 |
161+
| draw 100 text lines (standard font) | 643.2 | 1.55ms | 2.28ms | ±1.34% | 322 |
162162

163-
- **draw 100 lines** is 1.16x faster than draw 100 rectangles
164-
- **draw 100 lines** is 2.72x faster than create 10 pages with mixed content
165-
- **draw 100 lines** is 2.77x faster than draw 100 circles
166-
- **draw 100 lines** is 3.18x faster than draw 100 text lines (standard font)
163+
- **draw 100 lines** is 1.15x faster than draw 100 rectangles
164+
- **draw 100 lines** is 2.59x faster than draw 100 circles
165+
- **draw 100 lines** is 2.71x faster than create 10 pages with mixed content
166+
- **draw 100 lines** is 3.16x faster than draw 100 text lines (standard font)
167167

168168
## Forms
169169

170170
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
171171
| :---------------- | ------: | ------: | ------: | -----: | ------: |
172-
| read field values | 329.7 | 3.03ms | 5.44ms | ±2.41% | 166 |
173-
| get form fields | 304.6 | 3.28ms | 5.79ms | ±3.05% | 153 |
174-
| flatten form | 117.2 | 8.53ms | 13.91ms | ±3.47% | 59 |
175-
| fill text fields | 89.2 | 11.21ms | 18.86ms | ±4.53% | 45 |
172+
| read field values | 341.0 | 2.93ms | 4.72ms | ±1.58% | 171 |
173+
| get form fields | 303.8 | 3.29ms | 5.96ms | ±3.15% | 152 |
174+
| flatten form | 124.8 | 8.01ms | 10.42ms | ±1.89% | 63 |
175+
| fill text fields | 91.5 | 10.93ms | 15.56ms | ±4.75% | 46 |
176176

177-
- **read field values** is 1.08x faster than get form fields
178-
- **read field values** is 2.81x faster than flatten form
179-
- **read field values** is 3.70x faster than fill text fields
177+
- **read field values** is 1.12x faster than get form fields
178+
- **read field values** is 2.73x faster than flatten form
179+
- **read field values** is 3.73x faster than fill text fields
180180

181181
## Loading
182182

183183
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
184184
| :--------------------- | ------: | -----: | -----: | -----: | ------: |
185-
| load small PDF (888B) | 16.8K | 60us | 143us | ±0.73% | 8,383 |
186-
| load medium PDF (19KB) | 10.9K | 91us | 199us | ±0.64% | 5,470 |
187-
| load form PDF (116KB) | 721.0 | 1.39ms | 2.61ms | ±1.69% | 361 |
188-
| load heavy PDF (9.9MB) | 442.3 | 2.26ms | 2.88ms | ±0.88% | 222 |
185+
| load small PDF (888B) | 14.3K | 70us | 159us | ±3.70% | 7,152 |
186+
| load medium PDF (19KB) | 9.2K | 108us | 151us | ±4.32% | 4,612 |
187+
| load form PDF (116KB) | 738.4 | 1.35ms | 2.77ms | ±2.30% | 370 |
188+
| load heavy PDF (9.9MB) | 398.7 | 2.51ms | 3.61ms | ±1.48% | 200 |
189189

190-
- **load small PDF (888B)** is 1.53x faster than load medium PDF (19KB)
191-
- **load small PDF (888B)** is 23.25x faster than load form PDF (116KB)
192-
- **load small PDF (888B)** is 37.90x faster than load heavy PDF (9.9MB)
190+
- **load small PDF (888B)** is 1.55x faster than load medium PDF (19KB)
191+
- **load small PDF (888B)** is 19.37x faster than load form PDF (116KB)
192+
- **load small PDF (888B)** is 35.87x faster than load heavy PDF (9.9MB)
193193

194194
## Saving
195195

196-
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
197-
| :--------------------------------- | ------: | -----: | ------: | -----: | ------: |
198-
| save unmodified (19KB) | 9.0K | 112us | 251us | ±0.90% | 4,484 |
199-
| incremental save (19KB) | 6.2K | 162us | 342us | ±0.83% | 3,085 |
200-
| save with modifications (19KB) | 1.4K | 734us | 1.39ms | ±1.20% | 682 |
201-
| save heavy PDF (9.9MB) | 395.6 | 2.53ms | 2.94ms | ±0.40% | 198 |
202-
| incremental save heavy PDF (9.9MB) | 166.9 | 5.99ms | 13.98ms | ±8.41% | 84 |
196+
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
197+
| :--------------------------------- | ------: | -----: | -----: | -----: | ------: |
198+
| save unmodified (19KB) | 9.3K | 107us | 240us | ±0.82% | 4,660 |
199+
| incremental save (19KB) | 6.2K | 160us | 335us | ±0.87% | 3,125 |
200+
| save with modifications (19KB) | 1.3K | 743us | 1.40ms | ±1.37% | 673 |
201+
| save heavy PDF (9.9MB) | 424.2 | 2.36ms | 2.84ms | ±0.58% | 213 |
202+
| incremental save heavy PDF (9.9MB) | 121.9 | 8.20ms | 9.99ms | ±2.71% | 61 |
203203

204-
- **save unmodified (19KB)** is 1.45x faster than incremental save (19KB)
205-
- **save unmodified (19KB)** is 6.58x faster than save with modifications (19KB)
206-
- **save unmodified (19KB)** is 22.67x faster than save heavy PDF (9.9MB)
207-
- **save unmodified (19KB)** is 53.73x faster than incremental save heavy PDF (9.9MB)
204+
- **save unmodified (19KB)** is 1.49x faster than incremental save (19KB)
205+
- **save unmodified (19KB)** is 6.93x faster than save with modifications (19KB)
206+
- **save unmodified (19KB)** is 21.97x faster than save heavy PDF (9.9MB)
207+
- **save unmodified (19KB)** is 76.44x faster than incremental save heavy PDF (9.9MB)
208208

209209
## Splitting
210210

211211
### Extract single page
212212

213213
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
214214
| :--------------------------------------- | ------: | ------: | ------: | -----: | ------: |
215-
| extractPages (1 page from small PDF) | 983.6 | 1.02ms | 2.39ms | ±4.36% | 492 |
216-
| extractPages (1 page from 100-page PDF) | 280.5 | 3.57ms | 6.60ms | ±2.49% | 141 |
217-
| extractPages (1 page from 2000-page PDF) | 17.8 | 56.12ms | 57.45ms | ±1.11% | 10 |
215+
| extractPages (1 page from small PDF) | 929.1 | 1.08ms | 2.45ms | ±3.81% | 465 |
216+
| extractPages (1 page from 100-page PDF) | 272.8 | 3.67ms | 4.66ms | ±0.98% | 137 |
217+
| extractPages (1 page from 2000-page PDF) | 17.0 | 58.83ms | 59.82ms | ±0.67% | 10 |
218218

219-
- **extractPages (1 page from small PDF)** is 3.51x faster than extractPages (1 page from 100-page PDF)
220-
- **extractPages (1 page from small PDF)** is 55.19x faster than extractPages (1 page from 2000-page PDF)
219+
- **extractPages (1 page from small PDF)** is 3.41x faster than extractPages (1 page from 100-page PDF)
220+
- **extractPages (1 page from small PDF)** is 54.66x faster than extractPages (1 page from 2000-page PDF)
221221

222222
### Split into single-page PDFs
223223

224224
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
225225
| :-------------------------- | ------: | -------: | -------: | -----: | ------: |
226-
| split 100-page PDF (0.1MB) | 32.0 | 31.27ms | 37.31ms | ±4.62% | 16 |
227-
| split 2000-page PDF (0.9MB) | 1.8 | 568.70ms | 568.70ms | ±0.00% | 1 |
226+
| split 100-page PDF (0.1MB) | 31.5 | 31.78ms | 36.59ms | ±3.34% | 16 |
227+
| split 2000-page PDF (0.9MB) | 1.7 | 575.36ms | 575.36ms | ±0.00% | 1 |
228228

229-
- **split 100-page PDF (0.1MB)** is 18.19x faster than split 2000-page PDF (0.9MB)
229+
- **split 100-page PDF (0.1MB)** is 18.11x faster than split 2000-page PDF (0.9MB)
230230

231231
### Batch page extraction
232232

233233
| Benchmark | ops/sec | Mean | p99 | RME | Samples |
234234
| :----------------------------------------------------- | ------: | ------: | ------: | -----: | ------: |
235-
| extract first 10 pages from 2000-page PDF | 17.3 | 57.83ms | 58.72ms | ±0.82% | 9 |
236-
| extract first 100 pages from 2000-page PDF | 16.5 | 60.59ms | 62.47ms | ±1.84% | 9 |
237-
| extract every 10th page from 2000-page PDF (200 pages) | 15.2 | 65.69ms | 69.26ms | ±2.21% | 8 |
235+
| extract first 10 pages from 2000-page PDF | 16.9 | 59.23ms | 60.71ms | ±1.10% | 9 |
236+
| extract first 100 pages from 2000-page PDF | 16.0 | 62.54ms | 63.94ms | ±1.38% | 8 |
237+
| extract every 10th page from 2000-page PDF (200 pages) | 14.9 | 66.94ms | 70.84ms | ±2.12% | 8 |
238238

239-
- **extract first 10 pages from 2000-page PDF** is 1.05x faster than extract first 100 pages from 2000-page PDF
240-
- **extract first 10 pages from 2000-page PDF** is 1.14x faster than extract every 10th page from 2000-page PDF (200 pages)
239+
- **extract first 10 pages from 2000-page PDF** is 1.06x faster than extract first 100 pages from 2000-page PDF
240+
- **extract first 10 pages from 2000-page PDF** is 1.13x faster than extract every 10th page from 2000-page PDF (200 pages)
241241

242242
---
243243

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