Benchmarks

Categoryvs harfbuzzjsvs opentype.jsvs freetype2

Path Extraction50x faster19x faster-

SVG Generation26x faster118x faster-

Latin Shaping1.5x faster13x faster-

Cyrillic Shaping1.2x faster20-30x faster-

CJK Shaping1.3x faster10-12x faster-

Arabic Shaping1.0x67x faster-

Hebrew Shaping1.2x faster19x faster-

Hindi Shaping3.3x faster9.0x faster-

Thai Shaping1.6x faster11x faster-

Myanmar Shaping11x faster16x faster-

Khmer Shaping2.2x faster7.7x faster-

UI Simulation6.2x faster--

Rasterization--1.5-10x faster

Cache Benefits--2x speedup on repeated shaping

MacBook Pro M1 Pro16 GBBun 1.3.4text-shaper 0.1.4

Glyph Paths

50x faster than HarfBuzz, 19x faster than opentype.js for path extraction.

Extract 10 glyph paths

text-shaper

4.0M ops/s

opentype.js

216.8k ops/s

harfbuzzjs

80.2k ops/s

SVG path generation (10 glyphs)

text-shaper

2.6M ops/s

harfbuzzjs

99.0k ops/s

opentype.js

21.9k ops/s

Text to SVG

Full text-to-SVG pipeline including shaping and path generation. 5.3-7.1x faster than HarfBuzz, 21-30x faster than opentype.js.

Hello World

text-shaper

311.9k ops/s

harfbuzzjs

58.5k ops/s

opentype.js

14.7k ops/s

Paragraph (87 chars)

text-shaper

57.5k ops/s

harfbuzzjs

8.1k ops/s

opentype.js

1.9k ops/s

Text Shaping

Basic Shaping

No features - mixed text

harfbuzzjs

90.8k ops/s

text-shaper

82.3k ops/s

All common features (liga + kern + calt)

text-shaper

134.6k ops/s

harfbuzzjs

110.1k ops/s

Standard ligatures - mixed text

text-shaper

133.1k ops/s

harfbuzzjs

109.6k ops/s

Cyrillic Scripts

1.2x faster than HarfBuzz across Russian, Ukrainian, and Belarusian. 20-30x faster than opentype.js.

Russian paragraph (1001 chars)

text-shaper

24.4k ops/s

harfbuzzjs

19.4k ops/s

opentype.js

815 ops/s

Ukrainian paragraph (788 chars)

text-shaper

28.0k ops/s

harfbuzzjs

23.6k ops/s

opentype.js

1.3k ops/s

Belarusian paragraph (712 chars)

text-shaper

30.9k ops/s

harfbuzzjs

26.3k ops/s

opentype.js

1.5k ops/s

CJK Scripts

1.3x faster than HarfBuzz for CJK text, 10-12x faster than opentype.js.

Chinese Simplified (329 chars)

text-shaper

68.5k ops/s

harfbuzzjs

52.3k ops/s

opentype.js

5.7k ops/s

Japanese (418 chars)

text-shaper

46.1k ops/s

harfbuzzjs

35.9k ops/s

opentype.js

3.7k ops/s

Korean (449 chars)

text-shaper

33.9k ops/s

harfbuzzjs

27.0k ops/s

opentype.js

3.4k ops/s

Latin Scripts

1.5x faster than HarfBuzz, 13x faster than opentype.js for Latin text.

English paragraph (1056 chars)

text-shaper

7.9k ops/s

harfbuzzjs

5.3k ops/s

opentype.js

622 ops/s

RTL Scripts

1-1.2x faster than HarfBuzz for Arabic and Hebrew. 19-67x faster than opentype.js.

Arabic paragraph (1121 chars)

text-shaper

3.8k ops/s

harfbuzzjs

3.6k ops/s

opentype.js

57 ops/s

Hebrew paragraph (1220 chars)

text-shaper

10.4k ops/s

harfbuzzjs

8.4k ops/s

opentype.js

558 ops/s

Complex Scripts

TextShaper matches HarfBuzz on Indic and Southeast Asian scripts, 7.7-16x faster than opentype.js.

Hindi paragraph (1105 chars)

text-shaper

4.8k ops/s

harfbuzzjs

1.5k ops/s

opentype.js

536 ops/s

Myanmar paragraph (984 chars)

text-shaper

4.2k ops/s

harfbuzzjs

399 ops/s

opentype.js

262 ops/s

Khmer paragraph (1004 chars)

text-shaper

4.9k ops/s

harfbuzzjs

2.2k ops/s

opentype.js

640 ops/s

Thai paragraph (832 chars)

text-shaper

5.5k ops/s

harfbuzzjs

3.5k ops/s

opentype.js

509 ops/s

Greek

1.2x faster than HarfBuzz, 27x faster than opentype.js for Greek text.

Greek paragraph (997 chars)

text-shaper

21.8k ops/s

harfbuzzjs

18.7k ops/s

opentype.js

822 ops/s

Caching Performance

Shape plan caching provides significant speedups for repeated shaping.

Repeated Shaping - Hello

text-shaper

1.2M ops/s

harfbuzzjs

796.3k ops/s

(first call)

729.7k ops/s

Repeated Shaping - paragraph (85 chars)

text-shaper

116.0k ops/s

(first call)

74.0k ops/s

harfbuzzjs

73.5k ops/s

Glyph Path Cache

text-shaper

101.4M ops/s

(first call)

1.1M ops/s

Real-World Simulations

UI Simulation - 8 labels with paths

text-shaper

142.0k ops/s

harfbuzzjs

22.9k ops/s

Document Simulation - 4 paragraphs

text-shaper

50.4k ops/s

harfbuzzjs

37.3k ops/s

Rasterization

Compared against FreeType2 (WebAssembly). TextShaper is 1.5-10x faster than FreeType2 at all sizes.

12px grayscale (5 glyphs)

text-shaper

38.8k ops/s

freetype2

25.8k ops/s

24px grayscale (5 glyphs)

text-shaper

34.8k ops/s

freetype2

18.0k ops/s

48px grayscale (5 glyphs)

text-shaper

25.5k ops/s

freetype2

8.2k ops/s

96px grayscale (5 glyphs)

text-shaper

16.8k ops/s

freetype2

2.7k ops/s

200px grayscale (5 glyphs)

text-shaper

6.7k ops/s

freetype2

658 ops/s

Render Modes

LCD subpixel (24px)

text-shaper

37.2k ops/s

freetype2

22.8k ops/s

Hinted (12px)

text-shaper

85.0k ops/s

freetype2

27.8k ops/s

Throughput

62 glyphs at 16px

text-shaper

4.6k ops/s

freetype2

1.8k ops/s

Varying sizes - 15 sizes per iteration

text-shaper

12.3k ops/s

freetype2

3.4k ops/s

Very large - 5 glyphs at 200px

text-shaper

6.7k ops/s

freetype2

658 ops/s

OpenType Features

No features - mixed text

harfbuzzjs

90.8k ops/s

text-shaper

82.3k ops/s

Standard ligatures (liga)

text-shaper

360.6k ops/s

harfbuzzjs

268.7k ops/s

Kerning pairs

text-shaper

339.0k ops/s

harfbuzzjs

234.7k ops/s

Small caps (smcp)

text-shaper

341.0k ops/s

harfbuzzjs

232.3k ops/s

Oldstyle figures (onum)

text-shaper

426.5k ops/s

harfbuzzjs

370.4k ops/s

Tabular figures (tnum)

text-shaper

578.8k ops/s

harfbuzzjs

513.8k ops/s

Fractions (frac)

text-shaper

456.0k ops/s

harfbuzzjs

252.8k ops/s

All common features (liga + kern + calt)

text-shaper

134.6k ops/s

harfbuzzjs

110.1k ops/s

Grapheme Clusters

0.4-3.8x vs Intl.Segmenter, 2-9.5x faster than graphemer.

Count graphemes - ASCII (11 chars)

intlSegmenter

541.7k ops/s

text-shaper

223.9k ops/s

graphemer

58.6k ops/s

Count graphemes - emoji simple (5 graphemes)

text-shaper

3.1M ops/s

intlSegmenter

827.1k ops/s

graphemer

330.9k ops/s

Count graphemes - emoji ZWJ (8 graphemes)

intlSegmenter

642.0k ops/s

text-shaper

616.9k ops/s

graphemer

138.0k ops/s

Count graphemes - Devanagari (8 graphemes)

text-shaper

676.1k ops/s

intlSegmenter

623.6k ops/s

graphemer

317.9k ops/s

Count graphemes - mixed (25 graphemes)

intlSegmenter

376.1k ops/s

text-shaper

246.6k ops/s

graphemer

121.4k ops/s

Split graphemes - emoji ZWJ (8 graphemes)

text-shaper

703.7k ops/s

intlSegmenter

646.1k ops/s

graphemer

222.2k ops/s