sjson
decimal
sjson | decimal | |
---|---|---|
7 | 15 | |
2,310 | 5,945 | |
- | 2.0% | |
0.0 | 7.4 | |
11 days ago | 11 days ago | |
Go | Go | |
MIT License | GNU General Public License v3.0 or later |
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sjson
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Rob Pike: Gobs of data (2011)
Someone made a benchmark of serialization libraries in go [1], and I was surprised to see gobs is one of the slowest ones, specially for decoding. I suspect part of the reason is that the API doesn't not allow reusing decoders [2]. From my explorations it seems like both JSON [3], message-pack [4] and CBOR [5] are better alternatives.
By the way, in Go there are a like a million JSON encoders because a lot of things in the std library are not really coded for maximum performance but more for easy of usage, it seems. Perhaps this is the right balance for certain things (ex: the http library, see [6]).
There are also a bunch of libraries that allow you to modify a JSON file "in place", without having to fully deserialize into structs (ex: GJSON/SJSON [7] [8]). This sounds very convenient and more efficient that fully de/serializing if we just need to change the data a little.
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1: https://github.com/alecthomas/go_serialization_benchmarks
2: https://github.com/golang/go/issues/29766#issuecomment-45492...
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3: https://github.com/goccy/go-json
4: https://github.com/vmihailenco/msgpack
5: https://github.com/fxamacker/cbor
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6: https://github.com/valyala/fasthttp#faq
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7: https://github.com/tidwall/gjson
8: https://github.com/tidwall/sjson
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Introducing Dot: The Magical Path Manipulator for Go! (open source)
A similar project: https://github.com/tidwall/sjson
- Modification of json string without deserialisation into map/struct
- Need help on appending fields to json bytes
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Anyone learning Go or building a side project?
Not sure what you need to do but there is https://github.com/tidwall/sjson for quick manipulation.
- Small Side Project On Sunday: Small Tool To Bump The Version
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What are your favorite packages to use?
I love https://github.com/tidwall/gjson and https://github.com/tidwall/sjson for fast and frictionless json reading and editing. It makes life so much easier for cases where you don't want to model a tree of nightmare-ish API responses, like Elasticsearch.
decimal
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Trouble understanding rounding when the next digit is after round precision is a #5?
Try it in JS with console.log(4.225 * 100);, you'll see the same unexpected result. Depending on your needs, it's actually fine to just be off by some amount. If it does really matter, then use an arbitrary precision library like https://github.com/shopspring/decimal to get the results you need.
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Handling currency values: facts and best practices
Most programming languages ( JavaScript, PHP, Go, Python, Java, C# ) have built-in support or 3rd-party libraries for handling this data type, even though the internal implementations can differ:
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Any go and python number experts here?
while working with money, dont use floats, use something like https://github.com/shopspring/decimal (go std lib doesnt have its own decimals yet)
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my first golang project!
Integers, or something like this: https://github.com/shopspring/decimal
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80x improvements in caching by moving from JSON to gob
I make heavy use of caching, and was caching both in-memory and in Redis using JSON to convert the data in to a string. The struct itself isn't super complicated, one level nested, and some fields use the shopspring/decimal library.
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Unexported interfaces usage question
I actually use this to represent monetary values btw :)
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How to round(2) float64?
Check out https://github.com/shopspring/decimal for doing money related calculations.
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Library recommendation -- money calculations, more accurate handling of floats
We personally use https://github.com/shopspring/decimal and it works well.
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What are your favorite packages to use?
decimal, one of the first Go library that created to work with decimal and monetary value.
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What libraries from other languages do you wish were ported over into go?
https://github.com/shopspring/decimal also.
What are some alternatives?
GJSON - Get JSON values quickly - JSON parser for Go
Golang Crypto Trading Bot - A golang implementation of a console-based trading bot for cryptocurrency exchanges
sqlx - general purpose extensions to golang's database/sql
decimal - A high-performance, arbitrary-precision, floating-point decimal library.
dot - Dot: A powerful Go package simplifying navigation and manipulation of complex data structures via dot-separated paths. Features include insertion into struct fields, maps, arrays, slices, and channels, along with robust error handling and support for diverse map keys.
go-money - Go implementation of Fowler's Money pattern
Gin - Gin is a HTTP web framework written in Go (Golang). It features a Martini-like API with much better performance -- up to 40 times faster. If you need smashing performance, get yourself some Gin.
go-finance - :warning: Deprecrated in favor of https://github.com/piquette/finance-go
zerolog - Zero Allocation JSON Logger
Testify - A toolkit with common assertions and mocks that plays nicely with the standard library
godotenv - A Go port of Ruby's dotenv library (Loads environment variables from .env files)
apd - Arbitrary-precision decimals for Go