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Using webpack and its polling watch feature (via watchpack) can drain CPU which is due to watchpack polling all the npm deps within node_modules folder. This is a quick hack/fix until proper fix is merged & available in watchpack.
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#!/bin/bash | |
# Should be used until https://github.com/webpack/watchpack/pull/23 is merged and available in npm | |
# See https://github.com/webpack/watchpack/issues/2#issuecomment-135204573 for more info | |
# Ensure we have npm | |
if ! hash npm 2>/dev/null; then | |
echo 'No NPM installed!' | |
exit 1 | |
fi | |
# npm@3 uses flat tree structure so account for that | |
if npm -v 2>/dev/null | grep -q "^2."; then | |
FILEPATH="node_modules/webpack/node_modules/watchpack/lib/DirectoryWatcher.js" | |
else | |
FILEPATH="node_modules/watchpack/lib/DirectoryWatcher.js" | |
fi | |
INSERTION_POINT_BEFORE="followSymlinks: false," | |
MISSING_OPTION="ignored: /node_modules/," | |
if ! cat ${FILEPATH} 2>/dev/null | grep -q "${MISSING_OPTION}"; then | |
echo 'Fixing webpack watch (polling) slowness with a manual hack. See https://github.com/webpack/watchpack/pull/23 for more info.' | |
sed -i "s|${INSERTION_POINT_BEFORE}|&\n${MISSING_OPTION}|" "${FILEPATH}" | |
fi |
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