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/stubs/message_supplier/message_copies (cumulative): long = 17
Number of types a message (typically the payload in an RPC response) had to be copied by a MessageSupplier instance. If the optimization in MessageSupplier (to avoid copying) is working, this counter should be growing at a much slower rate than /stubs/message_supplier/suppliers_created. On the other hand, if this counter grows as fast as /stubs/message_supplier/suppliers_created, this optimization is never actually avoiding any copies.
defined at production/rpc/stubs/base/message_supplier.cc:41 with annotations: CUMULATIVE=true