Why does rustc_serialize use uleb128 to encode all integers?

[bjorn3]

Especially for small integers like u16, the memory save is likely very small, while the extra instructions likely result in a slowdown.

rust/src/libserialize/opaque.rs

Lines 73 to 75 in 212b2c7

	fn emit_u16(&mut self, v: u16) -> EncodeResult {
	write_uleb128!(self, v, write_u16_leb128)
	}