Feature request: fmt_bytes()

[wlandau]

For performance studies like this one, it would be super helpful to pretty print sizes in bytes, with automatic conversion to KB, MB, GB, etc. as needed. Is this within scope?

[rich-iannone]

This is definitely within scope (and internally talked about before). Thanks for posting this as an issue, we hope to get to it soon!

[rich-iannone]

Use the following, taken from pryr:::print.bytes():

function (x, digits = 3, ...) 
{
    power <- min(floor(log(abs(x), 1000)), 4)
    if (power < 1) {
        unit <- "B"
    }
    else {
        unit <- c("kB", "MB", "GB", "TB")[[power]]
        x <- x/(1000^power)
    }
    formatted <- format(signif(x, digits = digits), big.mark = ",", 
        scientific = FALSE)
    cat(formatted, " ", unit, "\n", sep = "")
}