Protocol Buffers are awesome. Having schemas to deflate and inflate data while maintaining some kind of validation is a great concept. Compactr's goal is to build on that to better suit the Javascript ecosystem.
npm install compactr
const Compactr = require('compactr');
// Defining a schema
const userSchema = Compactr.schema({
id: { type: 'number' },
name: { type: 'string' }
});
// Encoding
userSchema.write({ id: 123, name: 'John' });
// Get the header bytes
const header = userSchema.headerBuffer();
// Get the content bytes
const partial = userSchema.contentBuffer();
// Get the full payload (header + content bytes)
const buffer = userSchema.buffer();
// Decoding a full payload
const content = userSchema.read(buffer);
// Decoding a partial payload (content)
const content = userSchema.readContent(partial);JSON: {"id":123,"name":"John"}: 24 bytes
Compactr (full): <Buffer 02 00 01 01 04 7b 4a 6f 68 6e>: 10 bytes
Compactr (partial): <Buffer 7b 4a 6f 68 6e>: 5 bytes
| Type | Count bytes | Byte size |
|---|---|---|
| boolean | 0 | 1 |
| number | 0 | 8 |
| int8 | 0 | 1 |
| int16 | 0 | 2 |
| int32 | 0 | 4 |
| double | 0 | 8 |
| string | 1 | 2/char |
| char8 | 1 | 1/char |
| char16 | 1 | 2/char |
| char32 | 1 | 4/char |
| array | 1 | (x)/entry |
| object | 1 | (x) |
| unsigned | 0 | 8 |
| unsigned8 | 0 | 1 |
| unsigned16 | 0 | 2 |
| unsigned32 | 0 | 4 |
- Count bytes range can be specified per-item in the schema*
See the full Compactr protocol
[Array] JSON x 737 ops/sec ±1.04% (91 runs sampled)
[Array] Compactr x 536 ops/sec ±1.25% (82 runs sampled)
[Array] size: { json: 0, compactr: 10 }
[Boolean] JSON x 996 ops/sec ±0.84% (93 runs sampled)
[Boolean] Compactr x 1,439 ops/sec ±1.24% (83 runs sampled)
[Boolean] Protobuf x 2,585 ops/sec ±1.32% (91 runs sampled)
[Boolean] size: { json: 23, compactr: 5, protobuf: 5 }
[Float] JSON x 713 ops/sec ±1.29% (88 runs sampled)
[Float] Compactr x 1,056 ops/sec ±1.38% (86 runs sampled)
[Float] Protobuf x 2,432 ops/sec ±1.45% (88 runs sampled)
[Float] size: { json: 41, compactr: 12, protobuf: 12 }
[Integer] JSON x 954 ops/sec ±0.77% (93 runs sampled)
[Integer] Compactr x 1,520 ops/sec ±1.21% (89 runs sampled)
[Integer] Protobuf x 2,676 ops/sec ±1.22% (90 runs sampled)
[Integer] size: { json: 24, compactr: 8, protobuf: 7 }
[Object] JSON x 512 ops/sec ±0.62% (90 runs sampled)
[Object] Compactr x 412 ops/sec ±1.46% (81 runs sampled)
[Object] Protobuf x 898 ops/sec ±0.92% (93 runs sampled)
[Object] size: { json: 46, compactr: 13, protobuf: 25 }
[String] JSON x 432 ops/sec ±0.79% (88 runs sampled)
[String] Compactr x 428 ops/sec ±0.87% (87 runs sampled)
[String] Protobuf x 738 ops/sec ±0.71% (90 runs sampled)
[String] size: { json: 57, compactr: 14, protobuf: 28 }
You are awesome! Open an issue on this project, identifying the feature that you want to tackle and we'll take the discussion there!
Apache 2.0 (c) 2020 Frederic Charette