Function intern 

pub fn intern(s: &str) -> Arc<str>

Intern a string, returning a reference-counted pointer.

If the string has been interned before, returns the existing Arc<str>. Otherwise, allocates a new Arc<str> and stores it for future lookups.

Performance

• First call for a string: O(n) where n is string length (allocation + hash)
• Subsequent calls: O(n) for hash lookup, but no allocation
• Cloning the result: O(1) (just incrementing reference count)

Examples

use prax_query::intern::intern;
use std::sync::Arc;

let s1 = intern("field_name");
let s2 = intern("field_name");

// Both point to the same allocation
assert!(Arc::ptr_eq(&s1, &s2));