What is lazy initialization Python?
In computer programming, lazy initialization is the tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed. In multithreaded code, access to lazy-initialized objects/state must be synchronized to guard against race conditions.
Is lazy initialization bad?
Lazy Initialization is the concept of deferring object creation until the object is actually first used. If used properly, it can result in significant performance gains.
Are Python Properties lazy?
Specifically, you can specify that particular attributes of your custom instance objects are lazy in these languages, which means these attributes aren’t created until they’re explicitly accessed. However, lazy attributes are less discussed in Python tutorials, as far as I know.
What is Python lazy loading?
Lazy loading is just a fancy name given to the process of initializing a class when it’s actually needed. In simple words, Lazy loading is a software design pattern where the initialization of an object occurs only when it is actually needed and not before to preserve simplicity of usage and improve performance.
Why is lazy initialized?
Lazy initialization is primarily used to improve performance, avoid wasteful computation, and reduce program memory requirements. You can improve the startup performance of the program by deferring initialization of the objects that are not required until the required objects have been created.
Is lazy initialization good practice?
Short answer: Using lazy initialization unconditionally is not a good idea. It has its places but one has to take into consideration the impacts this solution has.
What is lazy attribute in Python?
A lazy attribute for an object is like a usual attribute, except that, instead of being computed when the object is constructed (i.e. in __init__ ), it is computed on the fly the first time it is accessed. Technically, a lazy_attribute is a non-data descriptor (see Invoking Descriptors in the Python reference manual).
What is lazy Django?
Django Internationalization Lazy vs Non-Lazy translation When using non-lazy translation, strings are translated immediately. When using laziness, translation only occurs when actually used.
Which pattern is used for lazy initialization?
Lazy loading (also known as asynchronous loading) is a design pattern commonly used in computer programming and mostly in web design and development to defer initialization of an object until the point at which it is needed.
How can we avoid LazyInitializationException in JPA?
How to NOT fix the LazyInitializationException
- Don’t use FetchType. EAGER.
- Avoid the Open Session in View anti-pattern.
- Don’t use hibernate.
- Initializing associations with a LEFT JOIN FETCH clause.
- Use a @NamedEntityGraph to initialize an association.
- EntityGraph to initialize an association.
- Using a DTO projection.