Performances¶
Transaction performances are evaluated based on response time (Time to Last Byte or TTLB), which is converted into a score from 0 to 100 (higher is better). We call this rating TPDEX (Transaction Performance Index).
This score is then converted into a letter rating for display.
Response time (TTLB) to Transaction Performance Index (TPDEX)¶
Y Axis: TPDEX
X Axis: TTLB in milliseconds
Letter Rating¶
TPDEX threshold |
Response time threshold |
Rating |
|
|---|---|---|---|
98 |
25ms |
A++ |
|
96 |
50ms |
A+ |
|
93 |
100ms |
A |
|
83 |
250ms |
B |
|
69 |
500ms |
C |
|
49 |
1s |
D |
|
31 |
2s |
E |
|
17 |
4s |
F |
|
0 |
∞ |
G |
|