utils: Use mmap for disk images in deterministic mode#190
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We were reading the entire disk image into a stringstream for deterministic mode, which is slow and memory-intensive. Instead on POSIX hosts we can use `mmap` to lazily map the disk image into memory, allowing it to be streamed in as the guest actually needs data from it. Helps with iteration speed when debugging via deterministic mode.
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We were reading the entire disk image into a stringstream for deterministic mode, which is slow and memory-intensive. Instead on POSIX hosts we can use
mmapto lazily map the disk image into memory, allowing it to be streamed in as the guest actually needs data from it.Helps with iteration speed when debugging via deterministic mode.