use split_once instead of split to parse lsn strings
#1118
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[`str::split`](https://doc.rust-lang.org/std/primitive.str.html#method.split) allocates a vector and generates considerably more instructions when compiled than [`str::split_once`](https://doc.rust-lang.org/std/primitive.str.html#method.split_once). [`u64::from_str_radix(split_lo, 16)`](https://doc.rust-lang.org/std/primitive.u64.html#method.from_str_radix) will error if the `lsn_str` contains more than one `/` so this change should result in the same behavior as the current implementation despite not explicitly checking this.
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Thanks! The CI failure is unrelated - I'll fix that later. |
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str::splitallocates a vector and generates considerably more instructions when compiled thanstr::split_once.u64::from_str_radix(split_lo, 16)will error if thelsn_strcontains more than one/so this change should result in the same behavior as the current implementation despite not explicitly checking this.