Use of auto that causes a copy
Unnecessary object copies can affect performance. Using the auto keyword without an & causes a copy.
/data/mci/6140986752f315ae1d2c1d7ffa1ce13a/bazel_cache/1e034c4de3ae6337dc7b387a79ef43e8/execroot/_main/src/mongo/db/exec/agg/exec_pipeline.cpp:129: AUTO_CAUSES_COPY 174974 Using the "auto" keyword without an "&" causes the copy of an object of type "mongo::CommonStats".
/data/mci/6140986752f315ae1d2c1d7ffa1ce13a/bazel_cache/1e034c4de3ae6337dc7b387a79ef43e8/execroot/_main/src/mongo/db/exec/agg/exec_pipeline.cpp:129: AUTO_CAUSES_COPY 174974 The variable "stats" has a non-"const" type, however its value is never changed.