2. we compile the binary with debug symbols

symbols are usually included even with debuglevel 0, unless stripped[0]. And debuginfo is configurable at several levels[1]. If you've set it to 2/full try dropping to a lower level, that might also result in less data to load for the backtrace implementation.

[0] https://users.rust-lang.org/t/difference-between-strip-symbo... [1] https://doc.rust-lang.org/cargo/reference/profiles.html#debu...