There is no answer to this question.
Performance is affected by space definitions for each table (INITIAL/NEXT) or for the entire tablespace. Read Oracle’s documentation on CREATE TABLE and CREATE TABLESPACE for clarification.
Performance on a database with only ONE tablespace will depend on the placement physically of tables and indexes (i.e., primary and foreign keys) within the design. Adjacent structures perform faster than structures separated. The type of disk (internal or NAS/SAN), rotation speed, etc., also affects performance.
All the physical stuff is good, but if it is slow and meets the users’ needs, performance is ultimately fine.