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| author | John Naylor <john.naylor@postgresql.org> | 2022-08-31 10:39:17 +0700 |
|---|---|---|
| committer | John Naylor <john.naylor@postgresql.org> | 2022-09-02 09:36:22 +0700 |
| commit | 0a8de93a48ce1e7479fb75fe10a8859559ec0c09 (patch) | |
| tree | 497ee333fbb408e740a0b539481f50e9401db81c /src/backend/access/transam/xlog.c | |
| parent | 05519126a02ee39bf0957d3d85a1da5bd7e1c09c (diff) | |
| download | postgresql-0a8de93a48ce1e7479fb75fe10a8859559ec0c09.tar.gz postgresql-0a8de93a48ce1e7479fb75fe10a8859559ec0c09.zip | |
Speed up lexing of long JSON strings
Use optimized linear search when looking ahead for end quotes,
backslashes, and non-printable characters. This results in nearly 40%
faster JSON parsing on x86-64 when most values are long strings, and
all platforms should see some improvement.
Reviewed by Andres Freund and Nathan Bossart
Discussion: https://www.postgresql.org/message-id/CAFBsxsGhaR2KQ5eisaK%3D6Vm60t%3DaxhD8Ckj1qFoCH1pktZi%2B2w%40mail.gmail.com
Discussion: https://www.postgresql.org/message-id/CAFBsxsESLUyJ5spfOSyPrOvKUEYYNqsBosue9SV1j8ecgNXSKA%40mail.gmail.com
Diffstat (limited to 'src/backend/access/transam/xlog.c')
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