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POSerialization Performance and Google Android
 

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    <p>I'm looking for advice to speed up serialization performance, specifically when using the Google Android. For a project I am working on, I am trying to relay a couple hundred objects from a server to the Android app, and am going through various stages to get the performance I need.</p> <p>First I tried a terrible XML parser that I hacked together using Scanner specifically for this project, and that caused unbelievably slow performance when loading the objects (~5 minutes for a 300KB file). I then moved away from that and made my classes implement Serializable and wrote the ArrayList of objects I had to a file. Reading that file into the objects the Android, with the file already downloaded mind you, was taking ~15-30 seconds for the ~100KB serialized file. I still find this completely unacceptable for an Android app, as my app requires loading the data when starting the application. </p> <p>I have read briefly about Externalizable and how it can increase performance, but I am not sure as to how one implements it with nested classes. Right now, I am trying to store an ArrayList of the following class, with the nested classes below it.</p> <pre><code>public class MealMenu implements Serializable{ private String commonsName; private long startMillis, endMillis, modMillis; private ArrayList&lt;Venue&gt; venues; private String mealName; } </code></pre> <p>And the Venue class:</p> <pre><code>public class Venue implements Serializable{ private String name; private ArrayList&lt;FoodItem&gt; foodItems; } </code></pre> <p>And the FoodItem class:</p> <pre><code>public class FoodItem implements Serializable{ private String name; private boolean vegan; private boolean vegetarian; } </code></pre> <p>IF Externalizable is the way to go to increase performance, is there any information as to how java calls the methods in the objects when you try to write it out? I am not sure if I need to implement it in the parent class, nor how I would go about serializing the nested objects within each object.</p>
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