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CSV dramatic performance decrease in AE2025
Hey gang, I realized my AE 25.3.2 is handling CSV files reeeaaaaally badly. Any of you guys have any experience? I’ve been unsuccessful so far trying to google about this.
I’ve got a screengrab showcasing this. On the left is AE2025, on the right is AE2024, both running an identical aep file. The expression you see on screen is the only expression in the project, and the CSV file structure is as minimal as it gets. What’s that about? Do any of you know or have any suspicions?
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2 Replies
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hey bro! unfortunately AE 25 is known to have a regression in how it parses CSVs in expressions compared to 24. it’s just the way it is.
short solution: stick with 24 for this specific task if you need speed!
for a longer solution i’m gonna leave you a couple of tips:
1) Strip any trailing commas and empty lines.
2) Save CSV as plain UTF-8 without BOM.
3) Consider replacing $.evalFile() CSV parsing with a small JSON file instead since JSON parsing in expressions hasn’t changed and is more robust in AE25.
I hope this news is not too bad to read, but i prefer to be as honest as possible, hope that helps!
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Hey John,
this is really good information, thanks alot! I did realize that in the latest 2025 edition it got a tiny bit better again, but yeah, let’s hope it’s gonna get better soon. Thanks!
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