Processing a gzipped csv-file by line-by-line

[Jesse Phillips via Digitalmars-d-learn]

On Wednesday, 10 May 2017 at 22:20:52 UTC, Nordlöw wrote:
> What's fastest way to on-the-fly-decompress and process a 
> gzipped csv-fil line by line?
>
> Is it possible to combine
>
> http://dlang.org/phobos/std_zlib.html
>
> with some stream variant of
>
> File(path).byLineFast
>
> ?

You can't really parse a CSV file line-by-line.

H.S. Teoh mentioned fastcsv but requires all the data to be in 
memory.

If you can get the zip to decompress into a range of dchar then 
std.csv will work with it. It is by far not the fastest, but much 
speed is lost since it supports input ranges and doesn't 
specialize on any other range type.