· Developer 2.0

Go's compiler performs escape analysis to determine whether variables should be allocated on the stack or heap. When the compiler cannot guarantee a variable's lifetime is bounded to the caller function, it moves the variable to the heap. Using interfaces is one common reason for heap escapes. The `-gcflags="-m"` flag (or `go tool compile -m`) reveals escape analysis output, showing which variables are moved to the heap and what inlining optimizations occur — useful for diagnosing unexpected heap allocations.