hiroppon https://blog.hatena.ne.jp/hiroppon/ 中年engineerの独り言 - crumbjp https://crumbjp.hateblo.jp/ mongodb MongoDBでドキュメントがあるか無いか？を調べたい時 原文 Checking if a document exists -- MongoDB slow findOne vs find 参考になったので和訳した One of the biggest optimisations to make MongoDB writes faster is to avoid moving documents by doing updates in place to a preallocated document. You only want to preallocate if the document do… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcrumbjp.hateblo.jp%2Fentry%2F20130322%2F1363914971" title=" MongoDB で isExist - 中年engineerの独り言 - crumbjp" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> http://serverdensity.wpengine.netdna-cdn.com/wp-content/uploads/2013/03/findOne.png Hatena Blog https://hatena.blog 2013-03-22 10:16:11 rich https://crumbjp.hateblo.jp/entry/20130322/1363914971 1.0 100%