benchmark builds

benchmark.sh

#!/bin/bash

function find_sources() {
  find Firestore/Source Firestore/Example/Tests Firestore/core \( \
    -name \*.m -o -name \*.cc -o -name \*.mm \
    \) -print
}

function find_object_names() {
  find_sources | sed 's,.*/,,; s/\.[^\.]*$/.o/'
}

function find_object_find_args() {
  find_object_names | sed '
    1 s/^/-name /;
    2,$ s/^/-o -name /;
  '
}

function find_objects() {
  find ~/Library/Developer/Xcode/DerivedData \( $(find_object_find_args) \) -print
}

function clean_firestore() {
  find_objects | xargs rm
}

function clean_all() {
  rm -rf ~/Library/Developer/Xcode/DerivedData
}

function build() {
  xcodebuild \
    -workspace Firestore/Example/Firestore.xcworkspace \
    -scheme Firestore_IntegrationTests_iOS \
    -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 7' \
    ONLY_ACTIVE_ARCH=YES CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=YES \
    COMPILER_INDEX_STORE_ENABLE=NO \
    build 2>&1 | xcpretty 1>&2
}

function time_now() {
  gdate -u '+%s.%N'
}

function float_add() {
  bc <<< "$1 + $2"
}

function float_sub() {
  bc <<< "$1 - $2"
}

function timed_build() {
  start=$(time_now)
  build
  end=$(time_now)
  float_sub $end $start
}

function benchmark_all() {
  clean_all
  timed_build
}

function benchmark_full_firestore() {
  clean_firestore
  timed_build
}

function benchmark_incremental() {
  touch Firestore/core/src/firebase/firestore/util/status.h
  timed_build
}

benchmark=benchmark_all
iterations=10

results=()
total=0.0

echo "Warming up ..."

# warmup
$benchmark

echo "Running $iterations iterations ..."

for ((i=0; i<$iterations; i++)); do
  duration=$($benchmark)
  results+=($duration)
  total=$(float_add $total $duration)
  echo "$duration"
done

mean=$(bc <<< "scale = 4; $total / $iterations")

echo
echo "Results"
for result in "${results[@]}"; do
  echo $result
done

echo
echo "Total: $total"
echo "Count: $iterations"
echo "Mean:  $mean"