google app engine - Objectify: Datastore small operations for count queries -

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Google दस्तावेज़ के अनुसार 

  छोटे डेटास्टोर संचालन में डेटास्टोर आईडी या चाबियाँ आवंटित करने के लिए कॉल शामिल हैं- केवल पूछताछ, और ये संचालन स्वतंत्र हैं

यदि निम्नलिखित क्वेरी रिटर्न 10,000; यह 'एक छोटे से ऑपरेशन' या '10, 000 पठन कार्य 'होगा। 

  int count = ofy ()। लोड ()। प्रकार (कर्मचारी। वर्ग) .फ़िल्टर ("स्थान", "यूएस ") .keys () सूची () आकार ()।।

आपकी क्वेरी के लिए क्वेरी के लिए 1 रीड ऑपरेशन और परिणामों के लिए 10,000 छोटे ऑपरेशन होंगे । 

  int count = ofy ()। Load ()। प्रकार:  
 यह अधिक स्मृति कुशल (डेटास्टोर संचालन के मामले में कोई भिन्न नहीं) होगा। (कर्मचारी। वर्ग) .फ़िल्टर ("स्थान", "यूएस")। गिनती ();

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