will

# Now
irb(main):020:0> Benchmark.measure { User.all.group_by { |u| u.org }; nil }
=> #<Benchmark::Tms:0x005609082d33b0 @label="", @real=3.7103141639381647, @cstime=0.0, @cutime=0.0, @stime=0.18999999999999995, @utime=1.5, @total=1.69>

# eager loading orgs
irb(main):022:0> Benchmark.measure { User.eager(:org).all.group_by { |u| u.org }; nil }
=> #<Benchmark::Tms:0x0056090a1ccfa0 @label="", @real=1.3611143808811903, @cstime=0.0, @cutime=0.0, @stime=0.040000000000000036, @utime=1.1799999999999997, @total=1.2199999999999998>


# eager loading orgs, not finding deleted users, and only getting needed columns

will

// copied from https://github.com/gkaindl/meltdown-poc/blob/master/meltdown.c
// flush_reload from https://github.com/defuse/flush-reload-attacks
// TSX from https://github.com/andikleen/tsx-tools
// dump_hex from https://gist.github.com/ccbrown/9722406

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>

will

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <pthread.h>
#ifdef _MSC_VER
#include <intrin.h> /* for rdtscp and clflush */
#pragma optimize("gt",on)
#else
#include <x86intrin.h> /* for rdtscp and clflush */

will

require "pg"
require "time"
PG_EPOCH = Time.gm(2000,1,1).to_i

conn = PG.connect
tm = PG::TypeMapByOid.new
tm.add_coder PG::BinaryDecoder::Integer.new(oid: 1184)
conn.type_map_for_results = tm

def parse_text(r)

will

SameSite=strict cookies is another layer to help prevent CSRF attacts in newer browsers

Rails

(at least 5, no clue about earlier versions)

--- a/config/initializers/session_store.rb
+++ b/config/initializers/session_store.rb
@@ -1,3 +1,3 @@

will

# I wanted to make InsecureRandom.uuid to speed up specs, but

require 'securerandom'
require 'benchmark/ips'

Benchmark.ips do |x|
  x.report("sec") { SecureRandom.random_bytes(16) }
  x.report("rand") { Random::DEFAULT.bytes(16) }
end if ARGV[0] == '1'

will

Make it real

Ideas are cheap. Make a prototype, sketch a CLI session, draw a wireframe. Discuss around concrete examples, not hand-waving abstractions. Don't say you did something, provide a URL that proves it.

Ship it

Nothing is real until it's being used by a real user. This doesn't mean you make a prototype in the morning and blog about it in the evening. It means you find one person you believe your product will help and try to get them to use it.

Do it with style

will

• get a separate 512GiB drive to backup all your games and shit to
  • it needs to be formatted fat32/exfat and with MBR, not guid parition map
  • erase and parition in disk util
    • you might need defaults write com.apple.DiskUtility advanced-image-options 1 on el capitan, not sure if the option was always there and just missing it
• https://support.us.playstation.com/articles/en_US/KC_Article/Upgrade-PS4-HDD/
• https://www.playstation.com/en-us/support/system-updates/ps4/#newinstallation for the firmware
  • the little downlaod now picture in that section is what you need, ~800MiB file not the smaller one at the top of the page
  • I put it on the same separate backup drive following the directory naming requirements

will

# https://github.com/wbhart/mpir/blob/master/gmp-h.in#L262-L266
# https://gmplib.org/manual/Rational-Arithmetic.html#Rational-Arithmetic
require "spec"

require "big_int"

lib LibGMP
  struct MPQ
    _mp_num : MPZ
    _mp_den : MPZ

will

require "./src/pg"
# require "../hexdump/hex.cr"

require "big_int"

struct Numeric
  property ndigits
  property weight
  property sign
  property dscale