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GJSON Alternatives
Similar projects and alternatives to GJSON
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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.
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jsoniter
A high-performance 100% compatible drop-in replacement of "encoding/json" (by json-iterator)
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fastjson
Fast JSON parser and validator for Go. No custom structs, no code generation, no reflection (by valyala)
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mapstructure
Discontinued Go library for decoding generic map values into native Go structures and vice versa.
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better GJSON alternative or higher similarity.
GJSON discussion
GJSON reviews and mentions
Posts with mentions or reviews of GJSON.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-03-15.
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Decoding JSON sum types in Go without panicking
BTW double unmarshalling (and double marshalling) can be quite slow, so to speed up determining the object type you can extract the type field e.g. by using https://github.com/tidwall/gjson. It can be easily 10x faster for this kind of scenario
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Simplify Input Validation in Go with ginvalidator
ginvalidator is a set of Gin middlewares that wraps the extensive collection of validators and sanitizers offered by my other open source package validatorgo. It also uses the popular open-source package gjson for JSON field syntax, providing efficient querying and extraction of data from JSON objects.
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Don't let dicts spoil your code
gjson [1] and a few other go packages offer a way to parse arbitrary JSON without requiring structs to hold them.
re: Python. I like PyRight/PyLance for Python typing, it seems to "just work" afaict. I also like msgspec for dataclass like behavior [2].
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1: https://github.com/tidwall/gjson
2: https://jcristharif.com/msgspec/
- Gjson: Get JSON values quickly ā JSON parser for Go
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Some Go web dev notes
Templ [1] is great!
Another go mod that helps a lot when massaging JSON (something most web servers end up doing sooner or later) is GJSON [2].
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1: https://github.com/a-h/templ
2: https://github.com/tidwall/gjson
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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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Jj: JSON Stream Editor
```
I don't think there is a way to sort an array, though. However, there is an option to have keys sorted. Personally, I don't think there is much annoyance in that. One could just pipe `jj` output to `sort | uniq -c`.
[0]: https://github.com/tidwall/gjson/blob/master/SYNTAX.md
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Library to analyze an arbitrary JSON string
Iām using GJSON, so far so good!
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Mapping json fields in api calls to a struct to store them in a database or cache
If the fields you need are just a small subset of the whole json, maybe https://github.com/tidwall/gjson might be of use to read only those (using jsonpath) without needing to create complete corresponding structs.
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Which CPU to buy based on profiling
Thank you for the reminder, it's never too much of it :) Didn't say it, but the code was pprof-iled many times and i can really say it's well optimized. I use own libraries with on-the-fly equations (sums, avgs, emas, stds, ...) wherever possible and also made custom json parser as json messages are in fixed format, so the parser is about 10x faster than gjson. I optimized it to the point that I avoided using maps, and rather iterate via slice where ever possible.
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A note from our sponsor - SaaSHub
www.saashub.com | 18 Mar 2025
Stats
Basic GJSON repo stats
39
14,721
5.9
5 months ago
tidwall/gjson is an open source project licensed under MIT License which is an OSI approved license.
The primary programming language of GJSON is Go.
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