Speed of csvReader

[Edwin van Leeuwen via Digitalmars-d-learn]

On Thursday, 21 January 2016 at 09:39:30 UTC, data pulverizer 
wrote:
>   StopWatch sw;
>   sw.start();
>   auto buffer = std.file.readText("Acquisition_2009Q2.txt");
>   auto records = csvReader!row_type(buffer, '|').array;
>   sw.stop();


Is it csvReader or readText that is slow? i.e. could you move 
sw.start(); one line down (after the readText command) and see 
how long just the csvReader part takes?