Benchmarks

Categoryvs harfbuzzjsvs opentype.jsvs freetype2

Path Extraction16x faster10x faster-

SVG Generation1.1x faster5x faster-

Latin Shaping1.5x faster22x faster-

Cyrillic Shaping1.2-1.4x faster17-56x faster-

CJK Shaping1.3-1.5x faster11-13x faster-

Arabic Shaping1.2x faster86x faster-

Hebrew Shaping1.6x faster33x faster-

Hindi Shaping3.6x faster11x faster-

Thai Shaping2x faster12x faster-

Myanmar Shaping10.5x faster17x faster-

Khmer Shaping2.1x faster8x faster-

UI Simulation4.8x faster--

Rasterization--1.6-11x faster

Cache Benefits---

MacBook Pro M1 Pro16 GBBun 1.3.3text-shaper 0.1.3

Glyph Paths

16x faster than HarfBuzz, 10x faster than opentype.js for path extraction.

Extract 10 glyph paths

text-shaper

831.3k ops/s

opentype.js

86.8k ops/s

harfbuzzjs

52.4k ops/s

SVG path generation (10 glyphs)

text-shaper

77.5k ops/s

harfbuzzjs

71.3k ops/s

opentype.js

14.2k ops/s

Text to SVG

Full text-to-SVG pipeline including shaping and path generation. 1.2-1.5x faster than HarfBuzz, 4-6x faster than opentype.js.

Hello World

text-shaper

54.1k ops/s

harfbuzzjs

45.0k ops/s

opentype.js

12.1k ops/s

Paragraph (87 chars)

text-shaper

11.4k ops/s

harfbuzzjs

7.8k ops/s

opentype.js

1.8k ops/s

Text Shaping

Basic Shaping

LTR text (no features)

text-shaper

410.4k ops/s

harfbuzzjs

179.4k ops/s

liga + kern features

text-shaper

277.7k ops/s

harfbuzzjs

208.7k ops/s

Many features

text-shaper

204.5k ops/s

harfbuzzjs

186.2k ops/s

Cyrillic Scripts

1.2-1.4x faster than HarfBuzz across Russian, Ukrainian, and Belarusian. 17-56x faster than opentype.js.

Russian paragraph (1001 chars)

text-shaper

22.0k ops/s

harfbuzzjs

18.4k ops/s

opentype.js

761 ops/s

Ukrainian paragraph (788 chars)

text-shaper

27.9k ops/s

harfbuzzjs

22.7k ops/s

opentype.js

1.2k ops/s

Belarusian paragraph (712 chars)

text-shaper

36.2k ops/s

harfbuzzjs

26.0k ops/s

opentype.js

647 ops/s

CJK Scripts

1.3-1.5x faster than HarfBuzz for CJK text, 11-13x faster than opentype.js.

Chinese Simplified (329 chars)

text-shaper

63.5k ops/s

harfbuzzjs

43.5k ops/s

opentype.js

4.8k ops/s

Japanese (418 chars)

text-shaper

43.8k ops/s

harfbuzzjs

33.7k ops/s

opentype.js

3.3k ops/s

Korean (449 chars)

text-shaper

34.9k ops/s

harfbuzzjs

25.5k ops/s

opentype.js

3.1k ops/s

Latin Scripts

1.5x faster than HarfBuzz, 22x faster than opentype.js for Latin text.

English paragraph (1056 chars)

text-shaper

7.9k ops/s

harfbuzzjs

5.3k ops/s

opentype.js

363 ops/s

RTL Scripts

1.2-1.6x faster than HarfBuzz for Arabic and Hebrew. 33-100x faster than opentype.js.

Arabic paragraph (1121 chars)

text-shaper

4.3k ops/s

harfbuzzjs

3.6k ops/s

opentype.js

42 ops/s

Hebrew paragraph (1220 chars)

text-shaper

12.9k ops/s

harfbuzzjs

7.8k ops/s

opentype.js

387 ops/s

Complex Scripts

TextShaper outperforms HarfBuzz on Indic and Southeast Asian scripts, 8-17x faster than opentype.js.

Hindi paragraph (1275 chars)

text-shaper

5.0k ops/s

harfbuzzjs

1.4k ops/s

opentype.js

456 ops/s

Myanmar paragraph (1916 chars)

text-shaper

4.0k ops/s

harfbuzzjs

380 ops/s

opentype.js

230 ops/s

Khmer paragraph (1128 chars)

text-shaper

4.7k ops/s

harfbuzzjs

2.2k ops/s

opentype.js

575 ops/s

Thai paragraph (1301 chars)

text-shaper

5.6k ops/s

harfbuzzjs

2.8k ops/s

opentype.js

452 ops/s

Greek

1.2x faster than HarfBuzz, 28x faster than opentype.js for Greek text.

Greek paragraph (997 chars)

text-shaper

21.4k ops/s

harfbuzzjs

17.5k ops/s

opentype.js

750 ops/s

Caching Performance

Shape plan caching provides significant speedups for repeated shaping.

Repeated Shaping - Hello

text-shaper

695.6k ops/s

harfbuzzjs

486.6k ops/s

(first call)

57.0k ops/s

Repeated Shaping - paragraph (85 chars)

text-shaper

80.2k ops/s

harfbuzzjs

61.3k ops/s

(first call)

16.4k ops/s

Glyph Path Cache

text-shaper

15.8M ops/s

(first call)

3.4k ops/s

Real-World Simulations

UI Simulation - 8 labels with paths

text-shaper

95.5k ops/s

harfbuzzjs

20.0k ops/s

Document Simulation - 4 paragraphs

text-shaper

36.7k ops/s

harfbuzzjs

33.7k ops/s

Rasterization

Compared against FreeType2 (WebAssembly). TextShaper is 1.6-11x faster at all sizes.

12px grayscale (5 glyphs)

text-shaper

18.5k ops/s

freetype2

11.4k ops/s

24px grayscale (5 glyphs)

text-shaper

39.0k ops/s

freetype2

16.6k ops/s

48px grayscale (5 glyphs)

text-shaper

26.8k ops/s

freetype2

6.4k ops/s

96px grayscale (5 glyphs)

text-shaper

13.3k ops/s

freetype2

2.0k ops/s

200px grayscale (5 glyphs)

text-shaper

6.8k ops/s

freetype2

614 ops/s

Render Modes

LCD subpixel (24px)

text-shaper

38.8k ops/s

freetype2

14.3k ops/s

Hinted (12px)

text-shaper

71.7k ops/s

freetype2

19.9k ops/s

Throughput

62 glyphs at 16px

text-shaper

3.5k ops/s

freetype2

435 ops/s

Varying sizes - 15 sizes per iteration

text-shaper

10.9k ops/s

freetype2

2.5k ops/s

Very large - 5 glyphs at 200px

text-shaper

6.8k ops/s

freetype2

614 ops/s

OpenType Features

No features - mixed text

harfbuzzjs

58.3k ops/s

text-shaper

55.5k ops/s

Standard ligatures (liga)

text-shaper

177.5k ops/s

harfbuzzjs

108.2k ops/s

Kerning pairs

harfbuzzjs

178.5k ops/s

text-shaper

108.0k ops/s

Small caps (smcp)

text-shaper

213.8k ops/s

harfbuzzjs

183.6k ops/s

Oldstyle figures (onum)

harfbuzzjs

276.4k ops/s

text-shaper

273.9k ops/s

Tabular figures (tnum)

text-shaper

355.0k ops/s

harfbuzzjs

192.6k ops/s

Fractions (frac)

text-shaper

322.2k ops/s

harfbuzzjs

175.2k ops/s

All common features (liga + kern + calt)

harfbuzzjs

101.1k ops/s

text-shaper

89.0k ops/s

Grapheme Clusters

Count graphemes - ASCII (11 chars)

text-shaper

335.4k ops/s

Count graphemes - emoji simple (5 graphemes)

text-shaper

3.2M ops/s

Count graphemes - emoji ZWJ (8 graphemes)

text-shaper

659.2k ops/s

Count graphemes - Devanagari (8 graphemes)

text-shaper

632.2k ops/s

Count graphemes - mixed (25 graphemes)

text-shaper

243.7k ops/s

Split graphemes - emoji ZWJ (8 graphemes)

text-shaper

548.7k ops/s