Optimize cemented callbacks #1976

Job	Run time
Linux [UBSAN] [lmdb \| clang]	37m 44s
Linux [ASAN] [lmdb \| clang]	37m 39s
macOS [UBSAN] [lmdb \| clang]	34m 58s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	37m 50s
macOS [ASAN] [lmdb \| clang]	30m 45s
Linux [TSAN] [lmdb \| clang]	37m 59s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	39m 0s
macOS [TSAN] [lmdb \| clang]	30m 54s
Linux [UBSAN] [rocksdb \| clang]	44m 8s
macOS [UBSAN] [rocksdb \| clang]	40m 13s
Linux [ASAN] [rocksdb \| clang]	50m 56s
macOS [ASAN] [rocksdb \| clang]	36m 20s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	51m 23s
macOS [TSAN] [rocksdb \| clang]	1h 17m 19s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	51m 9s
	10h 38m 17s

Provide feedback