4.0 Or Newer

Environment

Our test machine has the following setup:

Operating System: Microsoft Windows 10 Enterprise N
Processor: Intel(R) Xeon(R) CPU E3-1245 v5 @ 3.50GHz, 3504 Mhz, 4 Core(s), 8 Logical Processor(s)
Memory: 64 GB

Any results marked with an asterisk (*) are done with EAP(X) models, starting with 4.0.0 we will focus our performance testing on QEA(X) models.

Test results

Small Model

LT Version	1) Loading models	2) Premerge calculation	3) Writing merge file	Max RAM usage
4.0.0	2s	0s	1s	756 MB
3.3.1*	3s	0s	0s	901 MB
3.3.0*	3s	0s	0s	740 MB

Medium Model

LT Version	1) Loading models	2) Premerge calculation	3) Writing merge file	Max RAM usage
4.0.0	1m1s	6s	21s	6.546 MB
3.3.1*	1m0s	7s	13s	6.867 MB
3.3.0*	1m4s	8s	12s	6.364 MB

Large Model

LT Version	1) Loading models	2) Premerge calculation	3) Writing merge file	Max RAM usage
4.0.0	2m11s	3m10s	18m54s	12.867 MB
3.3.1*	2m14s	3m38s	17m31s	14.924 MB
3.3.0*	2m14s	3m47s	17m41s	14.827 MB

EAExample

LT Version	1) Loading models	2) Premerge calculation	3) Writing merge file	Max RAM usage
4.0.0	5s	8s	1m56s	2.405 MB
3.3.1*	9s	8s	2m19s	1.886 MB
3.3.0*	8s	9s	2m23s	1.563 MB

Tagged Value Model

LT Version	1) Loading models	2) Premerge calculation	3) Writing merge file	Max RAM usage
4.0.0	1m5s	12s	3m16	6.005 MB
3.3.1*	1m7s	18s	2m53s	7.810 MB
3.3.0*	1m11s	14s	3m5ss	7.799 MB

TV Model (Triple Size)

LT Version	1) Loading models	2) Premerge calculation	3) Writing merge file	Max RAM usage
4.0.0	3m12s	36s	11m50s	11.482 MB
3.3.1*	3m28s	41s	11m53s	18.702 MB
3.3.0*	3m13s	41s	11m43s	19.500 MB

Remarks

The new test machine consumes significantly more memory for the "Large Model" and the "TV Model (Triple Size)" - even with LemonTree versions which have completed the same merges on the old test hardware with significantly less memory usage. We currently assume that this is because the garbage collector isn't triggered as often on this machine because of excess available RAM - or, in layman's terms - if the RAM is available, LemonTree is going to use it. This speeds up the merge in total. However, we don't have any insight yet how much of the performance gain is due to the change in processing power, and how much is due to the additional RAM. This circumstance is still under investigation.