Usage would show if it's of wider interest or just pleasing you and a handful of others.

Without knowing more about the OPs specific use case, i certainly don't know if this attempt at optimization is actually required or if we're dealing with an X/Y problem here.

For example, if the input dataset is refered often, but hardly ever changes, caching the parsed results might decrease wait time orders of magnitude more in the long run than trying to optimize the parsing time. If new or changed data is also not used immediately, throw in a bit of pre-computing, and we're basically down to the time it requires to read a file from disk (and even then there are ways to optimize it, for example by pre-caching in RAM).