profile

The goal of profile is to read and write files that contain run time profiling data. Currently, profile supports:

• Files created by Rprof()
• .proto files written by pprof -proto, these can also be read by pprof

The data is available to the user for inspection and manipulation in a documented stable data format.

Installation

You can install profile from GitHub with:

# install.packages("pak")
pak::pak("r-prof/profile")

Example

This simple example converts an .out file generated by Rprof() to the .proto format understood by pprof.

rprof_path <- tempfile("profile", fileext = ".out")
Rprof(rprof_path, line.profiling = TRUE)
x <- runif(1e6)
res <- vapply(x, function(x) if (x < 0.5) sqrt(x) else x * x, numeric(1))
Rprof(NULL)

library(profile)
ds <- read_rprof(rprof_path)
ds
#> Profile data: <n> samples
names(ds)
#> [1] "meta"         "sample_types" "samples"      "locations"    "functions"   
#> [6] ".rprof"
write_pprof(ds, file.path(tempdir(), "1.pb.gz"))