fread doesn't show progress under 1 thread

[arunsrinivasan]

Using the code here to generate tmp.csv,

require(data.table)
fread("~/Downloads/tmp.csv")
# Read 1000000 rows x 8 columns from 0.115GB file in 00:14.670 wall clock time (can be slowed down by any other open apps even if seemingly idle)
## data.table is printed

setDTthreads(1L)
fread("~/Downloads/tmp.csv")
# No status / progress message
## data.table is printed