pbf
iconv-lite
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pbf | iconv-lite | |
---|---|---|
4 | 3 | |
763 | 3,019 | |
0.9% | - | |
0.0 | 0.0 | |
over 1 year ago | 5 months ago | |
JavaScript | JavaScript | |
BSD 3-clause "New" or "Revised" License | MIT License |
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pbf
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Parquet-WASM: Rust-based WebAssembly bindings to read and write Parquet data
it's been about 3 years, but in Grafana at the time we were using something like ArrowJS + Arrow Flight + protobuf.js and then render the datasets into dashboards on Canvas, especially for streaming at ~20hz.
when i benchmarked the fastest lib to simply convert the protobuf decode (https://github.com/mapbox/pbf), it was 5x slower than native JSON parsing in browsers for dataframe-like structures (e.g. a few dozen 2k-long arrays of floats).
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Outperform Protobuf.js with fixed-size encoding
does it beat https://github.com/mapbox/pbf ?
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Protobuf-ES: The Protocol Buffers TypeScript/JavaScript runtime we all deserve
at least in the frontend (without WASM), it depends.
i tested https://github.com/mapbox/pbf and while it was faster for deep/complex structs vs an unoptimized/repetative JSON blob, it was slower at shallow structs and flat arrays of stuff. if you spend a bit of time encode stuff as flat arrays to avoid mem alloc, JSON parsing wins by a lot since it goes through highly optimized C or assembly, while decoding protobuf in the JIT does not.
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A standalone protobuf to typescript(for deno) code generator
The runtime is taken from mapbox/pbf (with basic type definitions)
iconv-lite
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How to avoid using inheritance in modeling a String API built on top of lists, in an imperative language?
Then, the Text (or call it String) class is also a List. There are 3 types of Text classes: Text8, Text16 and Text32. Notice I was kind of vague in what I meant there. Take Text8 for example. Using Text8, we have many different encodings. We have the UTF8 encoding, as well as many other "single byte encodings" like ASCII.
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Let's develop a QR Code Generator, part VII: other kinds of data
I won't go into detail about how to map a character into its Shift JIS code for now, as there are good libraries for the job (iconv-lite comes to mind, and you can even have a look to the actual table if you want to whip up your own solution). It's sufficient to say that we'll need 13 bits (213 = 8192) for each one of them.
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Let's develop a QR Code Generator, part II: sequencing data
For Kanji mode... oh dear. First, we'd have to get the Shift JIS code of the pictogram, and the best way to do it is using a library like iconv-lite or, if you want to to it on your own, use its symbol table. Also, not every symbol can be used, but only those in the ranges 0x8140 to 0x9FFC and 0xE040 to 0xEBBF. In the end, a Kanji character will take 13 bits.
What are some alternatives?
protobuf - Protocol Buffers for JavaScript (& TypeScript).
Numeral-js - A javascript library for formatting and manipulating numbers.
sia - Sia - Binary serialisation and deserialisation
underscore.string - String manipulation helpers for javascript
deno-pbf - Deno pbf port of https://github.com/mapbox/pbf
he - A robust HTML entity encoder/decoder written in JavaScript.
osm - Open Service Mesh (OSM) is a lightweight, extensible, cloud native service mesh that allows users to uniformly manage, secure, and get out-of-the-box observability features for highly dynamic microservice environments.
indent-string - Indent each line in a string
fast-encoding - Fast, cross-platform, small and easy-to-use base64 and hex encoding.
string-length - Get the real length of a string - by correctly counting astral symbols and ignoring ansi escape codes
img-encode - Encode an image to sound and view it as a spectrogram - turn your images into music
escape-string-regexp - Escape RegExp special characters