Re: appendBinaryStringInfo stuff

Hi,

On 2022-12-19 07:13:40 +0100, Peter Eisentraut wrote:
> I found a couple of adjacent weird things:
>
> There are a bunch of places in the json code that use
> appendBinaryStringInfo() where appendStringInfoString() could be used, e.g.,
>
> appendBinaryStringInfo(buf, ".size()", 7);
>
> Is there a reason for this? Are we that stretched for performance?

strlen() isn't that cheap, so it doesn't generally seem unreasonable. I
don't think we should add the strlen overhead in places that can
conceivably be a bottleneck - and some of the jsonb code clearly can be
that.

> I find this kind of code very fragile.

But this is obviously an issue.

Perhaps we should make appendStringInfoString() a static inline function
- most compilers can compute strlen() of a constant string at compile
time.

Greetings,

Andres Freund