Question 1

How to migrate from encoding/json to Sonic?

Accepted Answer

Use sonic.Marshal and sonic.Unmarshal as drop-in replacements, but note default differences like no HTML escaping. Enable ConfigStd for full compatibility or adjust options like EscapeHTML and SortKeys as needed from the README.

Question 2

Sonic vs go-json: which is faster?

Accepted Answer

Sonic consistently outperforms go-json in benchmarks, especially with JIT and SIMD optimizations. For example, decoding benchmarks show Sonic is 2-3x faster in generic scenarios, as detailed in the medium JSON benchmark results.

Question 3

Does Sonic validate JSON syntax?

Accepted Answer

Yes, Sonic validates JSON by default and returns decoder.SyntaxError with pretty-printed error positions. However, you can disable validation for speed with options like NoValidateSkipJSON, as mentioned in the tips section.

Question 4

How to handle large JSON files with Sonic?

Accepted Answer

Use streaming IO with NewDecoder from io.Reader or NewEncoder to io.Writer to process data in chunks, reducing memory footprint. Also, consider Pretouch for huge schemas to avoid runtime compilation delays.

Question 5

What are the memory implications of using Sonic's ast.Node?

Accepted Answer

ast.Node references the original JSON buffer for strings without escapes, saving CPU but increasing memory usage. Use CopyString option or LoadAll() for concurrent safety, but this may reduce performance as noted in the tips.

Question 6

Can Sonic work with custom JSON marshallers like encoding.TextMarshaler?

Accepted Answer

Yes, but by default Sonic quotes and escapes their output for security, which hurts performance. Enable encoder.NoQuoteTextMarshaler to skip this, but you must ensure RFC8259 compliance manually.

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