Well, that's one of the few easy and comfortable ways to verify yourself and your code in Lua, so I don't have many alternatives to printing...No idea. I got the same result. Must be some hiccup with the "print" functionality to print to the Rainmeter log from Lua.
I personally would NOT try to print 51,000 characters to a single string in the log. The log is not the same as the measure value displayed in the About / Skins panel, which gets the entire string value of the WebParser measure just fine.

Thanks for explaining the reason, much appreciated.About Rainmeter Log tab Message has 512 byte limitation.
https://github.com/rainmeter/rainmeter/blob/a0d66f5b8ca77bf5a7a81c97ca9e2a92e02da9f9/Library/DialogAbout.cpp#L653
Well, since I do agree that being lightweight is efficient but I don't agree that it should impede testing the Lua code via print(), I think I'll just scrap the project altogether, it was done for the community anyway (JSON parsing in 2 lines of Lua, which worked for smaller JSONs, though it still has some flaws), not for myself. Or, find a way to print everything, maybe breaking the string into lines or something. Not nice, but what can I do?

Statistics: Posted by Yincognito — Yesterday, 11:31 pm