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Large Excel export causes browser crash
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Topic: Large Excel export causes browser crash (Read 940 times)
wd_perf
Pro Ultimate
Newbie
Posts: 26
Large Excel export causes browser crash
«
on:
September 28, 2022, 04:22:46 am »
Previous topic:
https://paramquery.com/forum/index.php?topic=3908.0
I believe the crash with large data sets may be caused because of the JSZip.generate function used. According to
https://stuk.github.io/jszip/documentation/faq.html
the generateAsync function would do better at avoiding browser crashes.
Would you be able to update the JSZip version used to take advantage of generateAsync?
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wd_perf
Pro Ultimate
Newbie
Posts: 26
Re: Large Excel export causes browser crash
«
Reply #1 on:
October 19, 2022, 06:06:55 am »
Upon further review, it looks like the crash happens before the zip, in getBody().
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paramvir
Administrator
Hero Member
Posts: 6318
Re: Large Excel export causes browser crash
«
Reply #2 on:
October 19, 2022, 11:22:28 am »
Can you please attach sample Excel file which causes browser crash so that I can check it at my end.
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wd_perf
Pro Ultimate
Newbie
Posts: 26
Re: Large Excel export causes browser crash
«
Reply #3 on:
October 25, 2022, 01:49:07 am »
Hello, yes.
https://www.stats.govt.nz/assets/Uploads/International-trade/International-trade-June-2022-quarter/Download-data/international-trade-june-2022-quarter-csv.zip
In that zip file, the output_csv_full.csv can be imported but when exported in Excel format it crashes the browser tab.
Thank you.
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wd_perf
Pro Ultimate
Newbie
Posts: 26
Re: Large Excel export causes browser crash
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Reply #4 on:
October 26, 2022, 10:00:45 am »
Hello again. I was able to get it working by removing all .join("") calls and modifying getSheet() to return buffered content as shown here:
https://stackoverflow.com/a/46888173
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wd_perf
Pro Ultimate
Newbie
Posts: 26
Re: Large Excel export causes browser crash
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Reply #5 on:
October 29, 2022, 05:26:18 am »
Actually, that was breaking on very very large exports. I had to rewrite things to take advantage of JSZip3's support for Node streams in the file creation function.
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Large Excel export causes browser crash