[Backport 2.14-maintenance] 2.16 faster flake lock parsing #10187
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This PR reduces the creation of short-lived basic_json objects while parsing flake.lock files. For large flake.lock files (~1.5MB) I was observing ~60s being spent for trivial nix build operations while after this change it is now taking ~1.6s. (cherry picked from commit 7fd0de3) (cherry picked from commit f94fb63)
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Automatic backport to
2.14-maintenance, triggered by a label in #10183.