hellerbarde

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

noelbundick

# We set an environment variable in this phase so it gets picked up by pip, but we don't want to bake secrets into our container image
FROM python:3.6-alpine AS builder

ARG INDEX_URL
ENV PIP_EXTRA_INDEX_URL=$INDEX_URL

COPY requirements.txt .

RUN pip install -U pip \
    && pip install --user -r requirements.txt

zaloogarcia

from pyspark.sql.types import *

# Auxiliar functions
# Pandas Types -> Sparks Types
def equivalent_type(f):
  if f == 'datetime64[ns]': return DateType()
  elif f == 'int64': return LongType()
  elif f == 'int32': return IntegerType()
  elif f == 'float64': return FloatType()
  else: return StringType()

mniehoff

import importlib
import argparse


def get_installed_packages():
    import pkg_resources
    installed_packages = pkg_resources.working_set
    return sorted(["%s==%s" % (i.key, i.version) for i in installed_packages])