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| author | Péter Gömöri <[email protected]> | 2015-12-12 22:20:01 +0100 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2016-01-28 14:49:46 +0100 |
| commit | 27b489736a6bd147bd694e83fc0948cbf9d2bce6 (patch) | |
| tree | e03cc8c3c81366b5d1254c64db02749cb6d34114 | |
| parent | d8161c3ad977c0e20c075ecf58d8ac5769637828 (diff) | |
| download | otp-27b489736a6bd147bd694e83fc0948cbf9d2bce6.tar.gz otp-27b489736a6bd147bd694e83fc0948cbf9d2bce6.tar.bz2 otp-27b489736a6bd147bd694e83fc0948cbf9d2bce6.zip | |
Use file read buffering in dbg:trace_client
Trace files are typically large but contain small terms so we can expect
a performance gain from read buffering. dbg:trace_client with a dummy
handler ran more then 3x faster on a sample 200MB trace file.
fprof:profile can also gain a bit.
| -rw-r--r-- | lib/runtime_tools/src/dbg.erl | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/runtime_tools/src/dbg.erl b/lib/runtime_tools/src/dbg.erl index d2a7d734c1..22b531e6ee 100644 --- a/lib/runtime_tools/src/dbg.erl +++ b/lib/runtime_tools/src/dbg.erl @@ -1269,7 +1269,7 @@ gen_reader(follow_file, Filename) -> %% Opens a file and returns a reader (lazy list). gen_reader_file(ReadFun, Filename) -> - case file:open(Filename, [read, raw, binary]) of + case file:open(Filename, [read, raw, binary, read_ahead]) of {ok, File} -> mk_reader(ReadFun, File); Error -> @@ -1294,7 +1294,7 @@ mk_reader(ReadFun, Source) -> mk_reader_wrap([]) -> []; mk_reader_wrap([Hd | _] = WrapFiles) -> - case file:open(wrap_name(Hd), [read, raw, binary]) of + case file:open(wrap_name(Hd), [read, raw, binary, read_ahead]) of {ok, File} -> mk_reader_wrap(WrapFiles, File); Error -> |