奔走も虚しく、技術・流通を手に入れた地霊殿は、兵器の開発に乗り出した。

その兵器の名は——

SatoriGear is a blazing fast markdown parser with full incremental support that outputs MDAST.

It includes built-in support for GFM and MDC syntax and is fully compliant with the CommonMark specification. The plugin API is not yet public.

Installation

pnpm i satorigear

Usage

import { createParser } from "satorigear";

const parser = createParser({
  features: {
    attributes: true,
    binding: true,
    component: true,
    emoji: true,
    footnote: true,
    frontmatter: true,
    math: true,
    strikethrough: true,
    table: true,
    taskList: true,
  },
});

// one-shot parse
const mdast = parser.parse("...");

// incremental edit
const document = parser.createDocument("...");
document.edit([
  { start: 66, end: 66, text: ":" },
  { start: 66, end: 66, text: "nuxt-img" },
]);
const mdast = document.tree;

Performance

Benchmarked against Sätteri 0.10.5 and Remark ([email protected]), which also produce MDAST, with feature sets kept as equivalent as possible for each profile.

Median of 4 isolated mean-time runs at commit 174fd6c on Apple M3, node 26.5.0, arm64-darwin. SatoriGear and Sätteri run in paired AB/BA order; comparisons are normalized to SatoriGear (↑ faster, ↓ slower). Lower time and higher throughput are better.

CommonMark

CommonMark 0.31.2 specification, 205025 bytes, 1 document

| Engine | Mean time | vs. SatoriGear | Throughput | | --- | ---: | ---: | ---: | | SatoriGear | 879 µs | baseline | 222 MiB/s | | Sätteri | 1.19 ms | ↓ 1.35× | 164 MiB/s | | Remark | 62.9 ms | ↓ 71.49× | 3.11 MiB/s |

CommonMark 0.31.2 examples, 14919 bytes, 652 documents

| Engine | Mean time | vs. SatoriGear | Throughput | | --- | ---: | ---: | ---: | | SatoriGear | 546 µs | baseline | 26.0 MiB/s | | Sätteri | 2.21 ms | ↓ 4.05× | 6.42 MiB/s | | Remark | 25.9 ms | ↓ 47.33× | 0.55 MiB/s |

Built-in features

Rust release history, 910115 bytes, 1 document

| Engine | Mean time | vs. SatoriGear | Throughput | | --- | ---: | ---: | ---: | | SatoriGear | 12.9 ms | baseline | 67.4 MiB/s | | Sätteri | 14.9 ms | ↓ 1.16× | 58.2 MiB/s |

Public APIs README, 232580 bytes, 1 document

| Engine | Mean time | vs. SatoriGear | Throughput | | --- | ---: | ---: | ---: | | SatoriGear | 3.02 ms | baseline | 73.4 MiB/s | | Sätteri | 3.95 ms | ↓ 1.31× | 56.2 MiB/s |