ordian

1. Make sure your rust application uses https://github.com/gnzlbg/jemallocator as the global memory allocator (when in doubt, grep jemallocator in your Cargo.lock).
2. Install jemalloc (we'll only need jeprof), dot, ps2pdf and libunwind on your system. Enable jemallocator's profiling feature (if jemallocator is an indirect dependency, one trick to do is to add a dependency jemallocator = { version = "*", features = ["profiling"] } to your app and let cargo select the || of features for you).
3. export _RJEM_MALLOC_CONF=prof:true,lg_prof_interval:32,lg_prof_sample:19. lg_prof_interval sets how often profile dump should be written to disk measured in allocated bytes. The value is passed as a power of two, which is 2^32 in our case, i.e. every 4 GiB of allocations of long-lived objects (see https://github.com/jemalloc/jemalloc/wiki/Use-Case%3A-Heap-Profiling). lg_prof_sample:19 tells jemalloc to take a profiling sample every 2^19 = 512 KiB.
4. Running your binary should produce a bun

d11wtq

docker run -rm -t -i -v $(dirname $SSH_AUTH_SOCK) -e SSH_AUTH_SOCK=$SSH_AUTH_SOCK ubuntu /bin/bash

arvearve

Mathematics: What do grad students in math do all day?

by Yasha Berchenko-Kogan

A lot of math grad school is reading books and papers and trying to understand what's going on. The difficulty is that reading math is not like reading a mystery thriller, and it's not even like reading a history book or a New York Times article.

The main issue is that, by the time you get to the frontiers of math, the words to describe the concepts don't really exist yet. Communicating these ideas is a bit like trying to explain a vacuum cleaner to someone who has never seen one, except you're only allowed to use words that are four letters long or shorter.

What can you say?

qrush

pklaus

"""
Determine IPv4 addresses on a Linux machine via the socket interface.
Thanks @bubthegreat the changes to make it Py2/3 compatible and the helpful
code comments: https://gist.github.com/pklaus/289646#gistcomment-2396272
This version has all comments removed for brevity.
"""

import socket
import array
import struct