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perf: optimize write-db with single writeFileSync #435

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perf: optimize write-db with single writeFileSync #435

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20 changes: 9 additions & 11 deletions scripts/lib/write-db.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8,24 +8,22 @@
var fs = require('fs')

module.exports = function writeDatabaseSync (fileName, obj) {
var fd = fs.openSync(fileName, 'w')
var keys = Object.keys(obj).sort()

fs.writeSync(fd, '{\n')
var parts = ['{\n']

keys.forEach(function (key, i, arr) {
fs.writeSync(fd, ' ' + JSON.stringify(key) + ': {')

var end = endLine.apply(this, arguments)
var data = obj[key]
var keys = Object.keys(data).sort(sortDataKeys)

parts.push(' ', JSON.stringify(key), ': {')

if (keys.length === 0) {
fs.writeSync(fd, '}' + end)
parts.push('}', end)
return
}

fs.writeSync(fd, '\n')
parts.push('\n')
keys.forEach(function (key, i, arr) {
var end = endLine.apply(this, arguments)
var val = data[key]
Expand All @@ -35,16 +33,16 @@ module.exports = function writeDatabaseSync (fileName, obj) {
? JSON.stringify(val, null, 2).split('\n').join('\n ')
: JSON.stringify(val)

fs.writeSync(fd, ' ' + JSON.stringify(key) + ': ' + str + end)
parts.push(' ', JSON.stringify(key), ': ', str, end)
}
})

fs.writeSync(fd, ' }' + end)
parts.push(' }', end)
})

fs.writeSync(fd, '}\n')
parts.push('}\n')

fs.closeSync(fd)
fs.writeFileSync(fileName, parts.join(''))
}

function endLine (key, i, arr) {
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