I used an example to create 2000 worksheets and populate with some data. This worked extremely quickly however when I attempt to save individual worksheets to .pdf files, it became extremely slow. I tried the same with 22.214.171.124 and noted no improvement.
I am attaching a .txt file with the code I used, it will create 2000 worksheets and export them along the way to .pdf file, and then hide the worksheet, so each pdf file is 1 page and about 30kb, the performance degrades substantially after the first 100
I built in some logic to benchmark how long it takes to build each 100 worksheets and pdf files, as you can see the processing slows greatly as you get along, in the 1000th sheet range only 2 per minute.
PDF's 0 Through 100 Processing Took: 19 Seconds
PDF's 100 Through 200 Processing Took: 87 Seconds
PDF's 200 Through 300 Processing Took: 258 Seconds
PDF's 300 Through 400 Processing Took: 565 Seconds
I did not observe the same performance degradation using the sheetrender to jpg or other image format methods, the performance remained high.
Update: While still slow, the benchmarking logic I put in place failed to reset the timer for each 100 runs. Code should be:
Debug.Print("PDF's " & i - 100 & " Through " & i & " Processing Took: " & DateDiff(DateInterval.Second, dtStart, Now()) & " Seconds")
dtStart = Now()