From 295b343aecf330e830d79f06e0efc511e7d76da1 Mon Sep 17 00:00:00 2001 From: Jasper Ras Date: Tue, 5 Aug 2025 08:53:21 +0200 Subject: vault backup: 2025-08-05 08:53:21 --- Variables lives in the stack.md | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 Variables lives in the stack.md (limited to 'Variables lives in the stack.md') diff --git a/Variables lives in the stack.md b/Variables lives in the stack.md new file mode 100644 index 0000000..a929a67 --- /dev/null +++ b/Variables lives in the stack.md @@ -0,0 +1,19 @@ +[[Rust]] +[[Boxes live in the heap]] + + +--- + +The stack consists of frames. + +Frames are just mappings of names to values within a single scope, they are tightly coupled to a specific function + +Freeing is the act of discarding such a frame. + +If we assign a variable such as +```rust +let a = [0; 1_000_000]; +let b = a; +``` + +the value of a is **copied** to b (thus we get two huge arrays). This is **expensive**. Think about what happens when we call a function. \ No newline at end of file -- cgit v1.2.3