structura.js VS limu

Before 3.12, although the performance of limu was several times better than immer, it was far away from structura and mutative These new immutable data operation libraries still have many gaps, so they can only be debugged friendly and several times faster than immer as a promotional point. If you want to pursue the ultimate speed, it is recommended by default. mutative.

But is immer really the ultimate answer? The performance problem of immer is more prominent in large arrays and deep-level object scenarios. See this issue description, many authors in the community began to try to make breakthroughs, and noticed that structura and mutative, I found that it is indeed many times faster than immer as they said, but it still fails to solve the problem of both fast speed and good development experience. I will analyze the two issues in detail below.

Nice work! but please break down https://github.com/giusepperaso/structura.js/blob/master/src/index.ts into something more manageable (refactor through extraction and promotion)

limu is designed for modern browsers. It only considers the operating environment that supports Proxy and uses the mechanism of shallow copy on read and mark update on write. This allows users to operate variable data like original data. During the operation, only proxy objects are generated for the read nodes and returned to the user. After reading, the parent and child nodes are directly connected with shallow clone nodes. The proxy object is hidden in the meta data of the node. , after the operation is completed, a new data with structural sharing characteristics is generated, and the meta data generated during the reading process is removed.

for those recommending Immer, check out Mutative or Limu instead (much faster)

https://github.com/unadlib/mutative

https://github.com/tnfe/limu

Strongly recommend trying [limu](https://github.com/tnfe/limu)，it is now the fastest immutable data js lib，and it is also production environment available.

//You can verify through the following tests, and you are also welcome to add more performance test cases

Welcome to understand and pay attention to limu, visit documentation and right-click to bring up the console, you can ** Real-time experience **limu api and immer api for comparison (limu and immer objects are bound globally).

You are very welcome to submit your test to the benchmark directory of limu git repo

limu 🍋