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RUBY-3952 Cut allocations on the command tracing path - #3127
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comandeo-mongo merged 1 commit intoNov 4, 2026
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The command tracer read message.documents fourteen times per command, and took the command name and collection name with keys.first and values.first, which build an array of every key or value. Read the document and name once and pass them on, read the first key or value without building an array, and move the hello command names to a constant in Secure so that sensitive? no longer allocates an array on every command event.
jamis
approved these changes
Nov 4, 2026
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For every traced command the tracer read the command document fourteen times and built arrays of its keys and values just to get the first one. It now reads the document once, takes the first key and value without building arrays, and the hello command names are a constant, which also saves an array per event in command monitoring. Recorded spans look the same as before. Follows #3126.
Jira: https://jira.mongodb.org/browse/RUBY-3952