4.2内存模式 (Memory Mode)

The EVM uses a linear memory (i.e. starting at zero and growing), without a defined limit. Allocating memory costs a quadratic amount of gas, which severely limits the amount of memory usable in a single context (i.e. contract call).

EVM使用线性内存（即从零开始增长），没有一个定义的限制。分配内存需要花费二次方的gas量，这严重限制了单个环境（即合约调用）中可用的内存量。

In addition, the EVM has a separate memory space per context. Contexts may communicate with each other by copying data to call data and returning data buffers.

此外，EVM的每个环境都有一个独立的内存空间。环境可以通过将数据复制到调用数据和返回数据缓冲区来相互通信。

The FuelVM uses a single share memory block per transaction. Memory is allocated statically with a known upper bound, allowing for straightforward implementation of heap types such as vectors. Memory in the FuelVM is globally readable across contexts, but locally writable. Each context may only write to portions of the stack and the heap which it has ownership over.

FuelVM在每笔交易中使用一个单一的共享 内存块 内存是静态分配的，有一个已知的上限，允许直接实现堆的类型，如向量。FuelVM中的内存在整个环境中是只读的，但在本地是可修改的的。每个环境只能修改部分堆栈和其所有权对应的堆。