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Fix dwarfdump stdout handling #282

Merged
merged 1 commit into from
Feb 26, 2018
Merged

Fix dwarfdump stdout handling #282

merged 1 commit into from
Feb 26, 2018

Commits on Feb 26, 2018

  1. Let dwarfdump functions write to an arbitrary Write object, and buffe… 

    …r stdout

Before this change, every print(ln) was taking a lock, doing a write syscall,
and releasing the lock.

Before:

time ( target/release/examples/dwarfdump -i ~/mozilla-central/obj-ff-opt/dist/bin/libxul.so >& /dev/null )
real	8m25.647s
user	7m6.523s
sys	1m18.650s

After:

time ( target/release/examples/dwarfdump -i ~/mozilla-central/obj-ff-opt/dist/bin/libxul.so >& /dev/null )
real	3m35.072s
user	3m33.297s
sys	0m1.556s
    @rocallahan
    rocallahan committed Feb 26, 2018
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