szilard

sqlite vs R's data.table

TLDR;   sqlite (:memory:) 250 sec    data.table 7 sec


data: 100 million rows, 1 million groups
generated by: https://github.com/szilard/benchm-databases/blob/master/0-gendata.txt

wch

library(inline)

inc <- '
/* This is taken from envir.c in the R 2.15.1 source 
   https://github.com/SurajGupta/r-source/blob/master/src/main/envir.c
*/
#define FRAME_LOCK_MASK (1<<14)
#define FRAME_IS_LOCKED(e) (ENVFLAGS(e) & FRAME_LOCK_MASK)
#define UNLOCK_FRAME(e) SET_ENVFLAGS(e, ENVFLAGS(e) & (~ FRAME_LOCK_MASK))
'

klmr

# Dummy object, only required for name resolution.
set = structure(list(), class = 'set')

print.set = function (x, ...) invisible(x)

`[.set` = function (set, expr, filter) {
    expr = substitute(expr)
    filter = substitute(filter)
    stopifnot(identical(expr[[1]], quote(`<-`)))
    stopifnot(identical(expr[[2]][[1]], quote(`|`)))

semenko

$ sudo dmidecode

# dmidecode 2.12
# SMBIOS entry point at 0x000f0000
SMBIOS 2.8 present.

<SNIP>

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information

artemklevtsov

variables:
  CODECOV_TOKEN: "CODECOV_TOKEN_STRING"
  _R_CHECK_CRAN_INCOMING_: "false"
  _R_CHECK_FORCE_SUGGESTS_: "true"
  APT_PKGS: "libcurl4-openssl-dev libssh2-1-dev libssl-dev libxml2-dev zlib1g-dev git"

before_script:
  - apt-get update
  - apt-get install -y --no-install-recommends ${APT_PKGS}
  - apt-get install -y --no-install-recommends qpdf pandoc pandoc-citeproc

textarcana

#!/usr/bin/env bash

# Use this one-liner to produce a JSON literal from the Git log:

git log \
    --pretty=format:'{%n  "commit": "%H",%n  "author": "%aN <%aE>",%n  "date": "%ad",%n  "message": "%f"%n},' \
    $@ | \
    perl -pe 'BEGIN{print "["}; END{print "]\n"}' | \
    perl -pe 's/},]/}]/'