Read, Manipulate, and Write Profiler Data

Defines a data structure for profiler data, and methods to read and write from the 'Rprof' and 'pprof' file formats.

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:

remotes::install_github("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: 33 samples
names(ds)
#> [1] "meta"         "sample_types" "samples"      "locations"   
#> [5] "functions"    ".rprof"
write_pprof(ds, file.path(tempdir(), "1.pb.gz"))