Function format_memory_size 

pub fn format_memory_size(bytes: u64) -> String

High-performance memory size formatting function

Converts byte count to human-readable memory size string, automatically selecting appropriate units. Uses bit shift operations for performance optimization, supports memory sizes from bytes to PB level.

Arguments

• bytes - The number of bytes to format

Returns

Returns formatted string, for example:

• 1024 → "1KB"
• 1536 → "1.5KB"
• 1073741824 → "1GB"

Supported Units

• B - Bytes (< 1024)
• KB - Kilobytes (1024 B)
• MB - Megabytes (1024 KB)
• GB - Gigabytes (1024 MB)
• TB - Terabytes (1024 GB)
• PB - Petabytes (1024 TB)

Performance Features

• Uses bit shift operations instead of division for performance optimization
• Hardware-optimized leading zero count instructions
• Retains only 1 decimal place for improved performance
• Zero-copy string construction

Examples

use auto_allocator;

// Basic usage
assert_eq!(auto_allocator::format_memory_size(0), "0B");
assert_eq!(auto_allocator::format_memory_size(1024), "1KB");
assert_eq!(auto_allocator::format_memory_size(1536), "1.5KB");
assert_eq!(auto_allocator::format_memory_size(1048576), "1MB");
assert_eq!(auto_allocator::format_memory_size(1073741824), "1GB");

// Use in combination with system information
let info = auto_allocator::get_allocator_info();
let memory_str = auto_allocator::format_memory_size(info.system_info.total_memory_bytes);
println!("Total system memory: {}", memory_str);

// Display memory usage in application
fn display_memory_usage() {
    let info = auto_allocator::get_allocator_info();
    println!("Memory information:");
    println!("  Total memory: {}", auto_allocator::format_memory_size(info.system_info.total_memory_bytes));
}

Precision Notes

For performance considerations, decimal places are limited to 1 digit. For scenarios requiring higher precision, it is recommended to calculate directly using byte counts.