Jacob Kahn jacobkahn

AI Research at FAIR, Meta AI (@facebookresearch), CS Faculty at @upenn. Formerly ran @pennapps.

jacobkahn / checkboxes.js

Created April 8, 2016 01:49

Check all checkboxes on a page with Javascript

	(function() {
	var aa = document.querySelectorAll("input[type=checkbox]");
	for (var i = 0; i < aa.length; i++){
	aa[i].checked = true;
	}
	})()

jacobkahn / .flowconfig

Created August 24, 2016 04:30

Flow Config that works with Create React App and Nuclide

	[libs]
	./node_modules/fbjs/flow/lib

	[options]
	esproposal.class_static_fields=enable
	esproposal.class_instance_fields=enable

	module.name_mapper='^$.*$\.css$' -> 'react-scripts/config/flow/css'
	module.name_mapper='^$.*$\.$jpg\\|png\\|gif\\|eot\\|otf\\|webp\\|svg\\|ttf\\|woff\\|woff2\\|mp4\\|webm$$' -> 'react-scripts/config/flow/file'

jacobkahn / pageCropper.py

Created March 2, 2017 21:48

Crops a PDF printout with multiple pages and aggregates into a single page.

	import copy
	from pyPdf import PdfFileWriter, PdfFileReader

	input1 = PdfFileReader(file("in.pdf", "rb"))
	output = PdfFileWriter()

	numPages = input1.getNumPages()
	for i in range(numPages):
	masterPage = input1.getPage(i)
	aggPageCollection = []

jacobkahn / gist:30d2be88bf621f898cd49b87c3bbf22a

Created January 28, 2018 18:58

keybase.md

	### Keybase proof

	I hereby claim:

	* I am jacobkahn on github.
	* I am jacobkahn (https://keybase.io/jacobkahn) on keybase.
	* I have a public key ASDukhNuTuFa6zcYoIgKqZOl-Mk9yhwaeV0o1T-qUzkd0Qo

	To claim this, I am signing this object:

jacobkahn / regexReplace.cpp

Created November 12, 2018 05:28

C++-compatible regex replace with only glibc regex.h

	#include <regex.h>

	std::string regexReplace(
	const std::string& inStr,
	const std::string& regexStr,
	const std::string& repl) {
	int ret = 0;
	// Create expr
	regex_t regex;
	if ((ret = regcomp(&regex, regexStr.c_str(), REG_EXTENDED))) {

jacobkahn / unsubscribe.js

Created January 31, 2019 16:23

Unsubscribe from Repositories in an Org

	function unwatchOrgRepos(orgName, repoNameFirstFourChars) {
	var repoItems = document.querySelectorAll(".repo-list > li")
	repoItems.forEach(function (item) {
	var repoOrgElement = item.querySelector(".repo-name").previousElementSibling;
	var repoElement = item.querySelector(".repo-name");
	var repoOrgName = repoOrgElement.innerText;
	if (repoOrgName === orgName && repoElement.innerHTML.substring(0, 4) == repoNameFirstFourChars) {
	var unwatchButton = item.querySelector(".js-unsubscribe-form > button");
	unwatchButton.click();
	var itemName = repoOrgElement.parentElement.innerText;

jacobkahn / examParsing.py

Created March 5, 2019 22:04

CIS 320 Exam Parser

	import uuid
	from pyPdf import PdfFileWriter, PdfFileReader

	for qq in range(1, 10):
	inputpdf = PdfFileReader(open("in" + str(qq) + ".pdf", "rb"))

	j = -1
	for i in xrange(inputpdf.numPages):
	print(i)
	if i % 10 == 0:

jacobkahn / gist:a92f4425abf831ac0799fabe9079263d

Last active July 23, 2019 22:01

NCCL Tests on 2 node p3dn.24xlarge + EFA - all_reduce_perf -b 8 -e 1G -f 2 -g 1 -c 1 -n 100

	#
	# out-of-place in-place
	# size count type redop time algbw busbw error time algbw busbw error
	# (B) (elements) (us) (GB/s) (GB/s) (us) (GB/s) (GB/s)
	8 2 float sum 163.4 0.00 0.00 2e-07 164.4 0.00 0.00 1e-07
	16 4 float sum 162.9 0.00 0.00 1e-07 162.3 0.00 0.00 1e-07
	32 8 float sum 164.1 0.00 0.00 1e-07 164.0 0.00 0.00 1e-07
	64 16 float sum 163.6 0.00 0.00 1e-07 163.3 0.00 0.00 1e-07
	128 32 float sum 164.1 0.00 0.00 1e-07 161.6 0.00 0.00 1e-07
	256 64 float sum 162.5 0.00 0.00 1e-07 163.0 0.00 0.00 1e-07

jacobkahn / gist:1fb3977e99056b7935a6c63dda1e145f

Created July 23, 2019 22:02

NCCL Tests on 4 node p3dn.24xlarge + EFA - all_reduce_perf -b 8 -e 1G -f 2 -g 1 -c 1 -n 100

	#
	# out-of-place in-place
	# size count type redop time algbw busbw error time algbw busbw error
	# (B) (elements) (us) (GB/s) (GB/s) (us) (GB/s) (GB/s)
	8 2 float sum 319.4 0.00 0.00 2e-07 319.2 0.00 0.00 0e+00
	16 4 float sum 320.9 0.00 0.00 1e-07 319.0 0.00 0.00 1e-07
	32 8 float sum 317.2 0.00 0.00 1e-07 318.1 0.00 0.00 1e-07
	64 16 float sum 321.3 0.00 0.00 1e-07 318.4 0.00 0.00 1e-07
	128 32 float sum 319.6 0.00 0.00 1e-07 319.4 0.00 0.00 1e-07
	256 64 float sum 318.1 0.00 0.00 1e-07 318.9 0.00 0.00 1e-07

jacobkahn / gist:3150a1a38abba40f58d8263d9c55969f

Created July 23, 2019 22:03

NCCL Tests on 8 node p3dn.24xlarge + EFA - all_reduce_perf -b 8 -e 1G -f 2 -g 1 -c 1 -n 100

	#
	# out-of-place in-place
	# size count type redop time algbw busbw error time algbw busbw error
	# (B) (elements) (us) (GB/s) (GB/s) (us) (GB/s) (GB/s)
	8 2 float sum 631.3 0.00 0.00 2e-07 632.3 0.00 0.00 0e+00
	16 4 float sum 686.3 0.00 0.00 2e-07 631.1 0.00 0.00 2e-07
	32 8 float sum 627.5 0.00 0.00 2e-07 628.7 0.00 0.00 2e-07
	64 16 float sum 632.0 0.00 0.00 2e-07 629.6 0.00 0.00 1e-07
	128 32 float sum 629.1 0.00 0.00 2e-07 628.8 0.00 0.00 2e-07
	256 64 float sum 628.2 0.00 0.00 2e-07 628.3 0.00 0.00 2e-07