Max Voitko mvoitko

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns
Compress 1K bytes with Zippy ............. 3,000 ns = 3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns = 20 µs
SSD random read ........................ 150,000 ns = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	import java.io.IOException;
	import java.net.URL;
	import java.util.Date;
	import java.util.List;
	import java.util.logging.Level;
	import org.json.*;

	import org.openqa.selenium.*;
	import org.openqa.selenium.chrome.*;
	import org.openqa.selenium.logging.*;

	[tool.poetry]
	name = "rating-engine"
	version = "0.1.0"
	description = ""
	authors = ["Alex Tonkonozhenko <[email protected]>"]

	[tool.poetry.dependencies]
	python = "^3.6"
	lxml = "^4.2"
	numpy = "^1.14"

	[tool.poetry]
	name = "dphelper"
	version = "0.1.6.dev0"
	description = ""
	authors = ["Alex Tonkonozhenko <[email protected]>"]

	[tool.poetry.dependencies]
	python = "*"
	psycopg2-binary = "^2.7"
	glomex-utils = "^0.0"

	FROM python:3.7.3-stretch

	COPY app /app

	RUN pip install pip==19.0.3
	RUN pip install poetry==1.0.0a2
	RUN source $HOME/.poetry/env
	RUN poetry install

	RUN useradd --create-home appuser

	ARG PYTHON_VERSION

	FROM lambci/lambda:build-python$PYTHON_VERSION

	RUN pip install -U pip
	RUN pip install poetry==1.0.0a2

	COPY bin/entrypoint /bin

	ENV AWS_REGION="eu-west-1"

	ARG PYTHON_VERSION

	FROM {registry_url}/lambda-base-image:$PYTHON_VERSION-0.5.0

	RUN curl https://raw.githubusercontent.com/apex/apex/master/install.sh \| sh

	ADD bin/download_terraform.sh /bin
	RUN /bin/download_terraform.sh

	FROM python:3.6-alpine

	ARG ENV

	WORKDIR /app
	RUN pip install -U pip
	RUN pip install awscli
	RUN mkdir train && \
	aws s3 cp s3://{bucket}/{model_file}.model train/{model_file}.model

	FROM ubuntu:18.04
	RUN apt-get update && apt-get install \
	-y --no-install-recommends python3 python3-virtualenv

	ENV VIRTUAL_ENV=/opt/venv
	RUN python3 -m virtualenv --python=/usr/bin/python3 $VIRTUAL_ENV
	ENV PATH="$VIRTUAL_ENV/bin:$PATH"

	# Install dependencies:
	COPY requirements.txt .

	"""
	Module for managing nested dictionary collections.
	"""

	# nestdict.py by Adam Szieberth (2013)
	# Python 3.3+

	class NestedDict(dict):
	"""
	Class for managing nested dictionary structures. Normally, it works