What is the most efficient way to de/serialize a `Set<Set<String>>` to String?

# getting-started

[Sam Stone]

What is the most efficient way to de/serialize a Set<Set<String>> to String?

[ephemient]

depends on what you mean by efficient and the values in use

[ephemient]

using kotlinx.#serialization, Json.encodeToString<Set<Set<String>>>(...) and Json.decodeFromString<Set<Set<String>>>(...) are easy

[ephemient]

without extra dependencies, if you have some unused chars, you could do .joinToString(";") { it.joinToString(",") } and .splitToSequence(';').map { it.splitToSequence(',').toSet() }.toSet(), or do that plus escaping

[Sam Stone]

In terms of runtime, which is faster?

[gildor]

if you don’t have kotlinx.serialization on your project, just use joinToString
If you do and performance matters for this case, just measure it