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| author | Björn Gustavsson <[email protected]> | 2015-04-20 15:32:22 +0200 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2015-04-20 15:33:44 +0200 |
| commit | d927209aa36fe370eb4ecf0a081923b0b951458b (patch) | |
| tree | 0806c1a237b782523854d9b31ee2af84b5f0ab88 /lib/stdlib/src/timer.erl | |
| parent | 6c3f8818f802164869519d58a538e70b1b8cc76c (diff) | |
| download | otp-d927209aa36fe370eb4ecf0a081923b0b951458b.tar.gz otp-d927209aa36fe370eb4ecf0a081923b0b951458b.tar.bz2 otp-d927209aa36fe370eb4ecf0a081923b0b951458b.zip | |
timer: Use monotonic_time/0 in tc/1,2,3
Diffstat (limited to 'lib/stdlib/src/timer.erl')
| -rw-r--r-- | lib/stdlib/src/timer.erl | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/lib/stdlib/src/timer.erl b/lib/stdlib/src/timer.erl index 19d803345e..c266177b4d 100644 --- a/lib/stdlib/src/timer.erl +++ b/lib/stdlib/src/timer.erl @@ -161,10 +161,11 @@ sleep(T) -> Time :: integer(), Value :: term(). tc(F) -> - Before = os:timestamp(), + T1 = erlang:monotonic_time(), Val = F(), - After = os:timestamp(), - {now_diff(After, Before), Val}. + T2 = erlang:monotonic_time(), + Time = erlang:convert_time_unit(T2 - T1, native, micro_seconds), + {Time, Val}. %% %% Measure the execution time (in microseconds) for Fun(Args). @@ -175,10 +176,11 @@ tc(F) -> Time :: integer(), Value :: term(). tc(F, A) -> - Before = os:timestamp(), + T1 = erlang:monotonic_time(), Val = apply(F, A), - After = os:timestamp(), - {now_diff(After, Before), Val}. + T2 = erlang:monotonic_time(), + Time = erlang:convert_time_unit(T2 - T1, native, micro_seconds), + {Time, Val}. %% %% Measure the execution time (in microseconds) for an MFA. @@ -190,10 +192,11 @@ tc(F, A) -> Time :: integer(), Value :: term(). tc(M, F, A) -> - Before = os:timestamp(), + T1 = erlang:monotonic_time(), Val = apply(M, F, A), - After = os:timestamp(), - {now_diff(After, Before), Val}. + T2 = erlang:monotonic_time(), + Time = erlang:convert_time_unit(T2 - T1, native, micro_seconds), + {Time, Val}. %% %% Calculate the time difference (in microseconds) of two |