It's more about the fact that the browser can store the parsed and even potentially optimized function in cache, not just the string form, when you go through normal pathways. new Function() is rather esoteric, and means it will definitely do a parse per instantiation, as well as cause some deoptimization around the instantiation.
Furthermore, using the library as is requires 'unsafe-eval' CSP directive on your entire page, which you otherwise might be able to avoid.
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It's more about the fact that the browser can store the parsed and even potentially optimized function in cache, not just the string form, when you go through normal pathways.
new Function()is rather esoteric, and means it will definitely do a parse per instantiation, as well as cause some deoptimization around the instantiation.Furthermore, using the library as is requires
'unsafe-eval'CSP directive on your entire page, which you otherwise might be able to avoid.