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Optimize value_iterator::get_string() #2211

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CarlosEduR
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Relates to: #1470

@CarlosEduR
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CarlosEduR commented Jul 11, 2024

@lemire I'd like to confirm it before making the PR ready for review

I believe the current changes are not covering all cases we've talked about.

In case the character \ is not present, we should just return the string_view instance.
Now if it contains the character \:

  1. and encounter " before any \, then we also just return the string_view instance
  2. if there is not ", we fallback on the existing code

is it correct?

const char* start = raw_json_string_result.value_unsafe().raw();
const char* json = start;

for (; *json != '\0'; ++json) {
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You don't think you need *json != '\0'... and, in fact, it is likely incorrect. The JSON spec does not forbig null characters inside the string as far as I can tell, and it does not enforce that the string be null terminated.

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lemire commented Jul 11, 2024

Let me do some work of my own (next few hours).

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