Optimize json_lex_string by batching character copying

When Who What
2022-07-11 04:25:32 John Naylor (john.naylor) Closed in commitfest 2022-07 with status: Committed
2022-07-11 04:25:32 John Naylor (john.naylor) Changed committer to john.naylor
2022-07-01 04:01:14 John Naylor (john.naylor) Added john.naylor as reviewer
2022-06-24 08:48:53 Jelte Fennema-Nio (jeltef) Changed authors to Jelte Fennema (jeltef)
2022-06-24 08:48:53 Jelte Fennema-Nio (jeltef) Changed targetversion to 16
2022-06-24 08:47:50 Jelte Fennema-Nio (jeltef) Attached mail thread PR3PR83MB0476F098CBCF68AF7A1CA89FF7B49@PR3PR83MB0476.EURPRD83.prod.outlook.com
2022-06-24 08:47:49 Jelte Fennema-Nio (jeltef) Created patch record