angular 2 lazy loading

is not commonly used, because lazy loading aims to reduce interaction with databases and improve execution efficiency. In a one-to-one relationship, each piece of data in the primary table corresponds to only one database from the table. Even if you query the data, it will not increase the interaction cost, and the primary table cannot have contrained = true, therefore, the primary table cannot be loaded l

between the proxy object and the real object. The client code does not know the real proxy object, the client code is interface-oriented, and it only holds the interface of a Proxied object.All in all, as long as the client code cannot or does not want to access the called object directly-there are a number of reasons, such as the need to create an object with a high overhead, or the object being called on the remote host, or the target object's functionality is not sufficient to meet the requi

used as the path for component lazy loading. 2. asynchronous loading methods supported by webpack Resolve => require ([URL], resolve), good support () => System. import (URL), which has been declared on the webpack2 official website will be gradually abolished and is not recommended. () => Import (URL), which i

1. Lazy Loading Note: domain object is not final! The lazy loading will inherit the class and then generate the proxy object of the new class, while the abstract class cannot be inherited. 1. The session. load method will load the associated objects of data in the query results by default. This method must be differe

Jquery automatically loads the text list through Ajax at the bottom of the page, similar to the lazy image loading effect, with loading effect Scroll to the top of the page to load Rolling Test View More >>> /* Endlesspage. js */var gPageSize = 10; var I = 1; // set the current page number, global variable $ (function () {// read data function getData (pagen

.Lazy LoadingPerformance:The fewer SQL statements issued, the higher the performanceMethod:1. Lazy Loading2. Crawl Strategy3. Cache Policy4.HQL statementLazy Loading 1. Lazy Loading of classes 1, using session.load method can generate proxy object2 . No SQL statements are

cache Add the above elements to the Hibernate.cfg.xml configuration file to turn on level two caching. And you must call Query1.setcacheable (true) before fetching the collection when using query for caching; Write the test cases below to Test: Test Results: Attention: 1. The query cache is based on a level two cache and must be configured with a level two cache when configuring the query cache otherwise the following exception will be thrown 2. A

you want to use lazy loading on an entity object, you must configure it in the entity's mapping configuration file as follows: ...... Turn on the lazy-load attribute of the entity by setting the class's Lazy property to true. If we run the following code: User user= (user) Session.load

I. Concept of deferred loadingWhen hibernate loads an object from the database, it does not load the associated object, but only the proxy object, obtaining a proxy object that uses the load in the session (without changing the lazy property to false). So in the above scenarios it is deferred loading.Two. Understanding the concept of immediate loadingWhen hibernate loads an object from the database, it loads the associated object, generates the actual

The content of this section: L MASTER the concept of delay strategy L Mastering lazy loading of entity objects L Mastering delay loading of collection types L Understanding Property Lazy Loading 1 Latency Policy Concepts The

---------------------------------------------------------------------------------------------------------- ---- Ultimate test: Note: Do not break the point when testing, otherwise it will affect the test results (if you make a breakpoint debugging, you will There is an extra SQL request), the above test is because of the break point to test, the result the final conclusion of the test, the above results are based on the following

Lazy Loading:The lazy load mechanism is proposed to avoid some unnecessary performance overhead, so-called lazy loading is when the data is really needed to perform the data loading operation. Lazy

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1, get, load method difference?Get: Load in a timely manner, just call the Get method to query the database immediatelyLoad: Lazy loading is used by default and queries to the database when data is used.2. Lazy Loading (lazy)2.1.

Lazy Loading:The lazy load mechanism is proposed to avoid some unnecessary performance overhead, so-called lazy loading is when the data is really needed to perform the data loading operation. Lazy

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data of two tables than to query one table.It depends on your actual needs. The delayed loading mechanism is proposed to avoid unnecessary performance overhead. The so-called delayed loading means that data loading is performed only when data is actually needed. Hibernate provides delayed loading of object objects and

Hibernate performance Optimizations-lazy loading Implemented with ASM and cglib two packages 1, Session.load (), the system does not go directly to the database, but through new to create a proxy object (the proxy object will not be empty, cannot be determined). Proxy object limit: Can be used before the session associated with the agent is closed User.getname () or User.getbirthday () and initialized mode

collection dept.getemps (). Size (); Close Session hibernateutil.closesession (); }The output results are as follows:③ multiple-to-one correlation query strategyThe The default value for the Lazy property is proxyProxy: Lazy LoadingNo-proxy: Agent-free lazy loadingFalse: Load NowExample: / * Multiple-to-one delay

collection dept.getemps (). Size (); Close Session hibernateutil.closesession (); }The output results are as follows:③ multiple-to-one correlation query strategyThe The default value for the Lazy property is proxyProxy: Lazy LoadingNo-proxy: Agent-free lazy loadingFalse: Load NowExample: / * Multiple-to-one delay