tor/src/or OR tor/src/core/or
or.h
#define DEFAULT_ROUTE_LEN 3
change this to
#define DEFAULT_ROUTE_LEN 6

routerparse.c
digest_algorithm_t alg = DIGEST_SHA1;
digest_algorithm_t alg = DIGEST_SHA256;
Leave this alone it will break tor if you change it.


/src/core/or/circuitstats.h

#define CBT_DEFAULT_RECENT_CIRCUITS 20
change to
#define CBT_DEFAULT_RECENT_CIRCUITS 10