# TTFX with DataFrames and CSV

**URL:** https://discourse.julialang.org/t/ttfx-with-dataframes-and-csv/75432
**Category:** General Usage
**Tags:** question, dataframes, csv, ttfp
**Created:** [January 29, 2022, 8:05pm UTC](https://discourse.julialang.org/t/ttfx-with-dataframes-and-csv/75432 "2022-01-29T20:05:54Z")
**Posts on this page:** 1
**Showing post:** 34

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### Author: ![Raf](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/raf/32/3383_2.png) [@Raf](https://discourse.julialang.org/u/Raf)
#### Post date: [January 31, 2022, 7:53pm UTC](https://discourse.julialang.org/t/ttfx-with-dataframes-and-csv/75432/34 "2022-01-31T19:53:50Z")

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Didn’t get much further.

A problem with doing this is there is so much noise in timing changes that it’s hard to be sure of small improvements. We need a `@ctime` macro that will run code in a fresh session mulltiple times and take an average, although it’s going to take a long time to run.

It also seems like reorganising code is only effective for really large blocks.

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