Use of auto that causes a copy
Unnecessary object copies can affect performance. Using the auto keyword without an & causes a copy.
/data/mci/7b5199136d945ea4e1751b7b3bd3d384/bazel_cache/658afbbc91b088dd7e554f8eea998579/execroot/_main/src/mongo/db/repl/split_horizon/split_horizon.cpp:81: AUTO_CAUSES_COPY 175526 This lambda has an unspecified return type. This implies "auto" and causes the copy of an object of type "std::string".
/data/mci/7b5199136d945ea4e1751b7b3bd3d384/bazel_cache/658afbbc91b088dd7e554f8eea998579/execroot/_main/src/mongo/db/repl/split_horizon/split_horizon.cpp:81: AUTO_CAUSES_COPY 175526 This return statement creates a copy.