Update reference performance data

Import sections

Import classes

Import major courses

Import time usage: 2.48s

Import time usage: 2.37s

Test search course 1: 1000

Test search course 1 time: 2.95s

Test search course 1 time: 1.59s

Test enroll course 1: 1000

Test enroll course 1 time: 0.28s

Test enroll course 1 time: 0.29s

Test drop enrolled course 1: 797

Test drop enrolled course 1 time: 0.15s

Import student courses

Import student courses time: 2.67s

Import student courses time: 2.50s

Test drop course: 88423

Test drop course time: 1.14s

Test drop course time: 1.18s

Test course table 2: 1000

Test course table 2 time: 0.24s

Test course table 2 time: 0.59s

Test search course 2: 1000

Test search course 2 time: 3.17s

Test search course 2 time: 1.79s

Test enroll course 2: 1000

Test enroll course 2 time: 0.28s

Test enroll course 2 time: 0.26s