ID 532693 - Considerably slower export speed in Mari 4.8 and later compared to Mari 4.7

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Problem summary
Considerably slower export speed in Mari 4.8 and later compared to Mari 4.7
 
Customer reported version
Mari 4.8v4
 
Customer reported platform
n/a
 
Steps to reproduce
 
1) Create an Example Project and load it

2) Open the Export Manager and ensure all of the Channels are added as Export Items
 
3) Click Export Current and time the export
(Alternatively, run the attached script for accurate timing of the export)

4) Repeat steps 1-2 in Mari 4.7 and compare the timings
 
Expected behaviour
Similar export times to Mari 4.7.
 
Actual behaviour
(Times averaged from 3 batch exports)
  • Mari 4.8 and later: 51s
  • Mari 4.7: 21s
 
Workaround
Unknown.
 
Reproduced by support
This bug has been reproduced in:
Mari 6.0v1 - Windows 10 - CentOS 7.9
Mari 4.8v1 - Windows 10 - CentOS 7.9 - regression
 
Unable to reproduce bug in:
Mari 4.7v7 - Windows 10 - CentOS 7.9
 
Earliest version tested
Mari 4.7v7 - This issue doesn't appear in this version and has regressed
 
 

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