如何不打印BenchmarkTools @时间到cmd?

Question

我有以下Julia程序:

using BenchmarkTools
function isPerm(x::Int, y::Int)

numZeroX = 0
numOneX = 0
numTwoX = 0
numThreeX = 0
numFourX = 0
numFiveX = 0
numSixX = 0
numSevenX = 0
numEightX = 0
numNineX = 0

numZeroY = 0
numOneY = 0
numTwoY = 0
numThreeY = 0
numFourY = 0
numFiveY = 0
numSixY = 0
numSevenY = 0
numEightY = 0
numNineY = 0

strX = string(x,10,6)
strY = string(y,10,6)

for i in 1:length(strX)
if cmp(strX[i:i],"0") > 0
numZeroX = numZeroX + 1
end
if cmp(strX[i:i],"1") > 0
numOneX = numOneX + 1
end
if cmp(strX[i:i],"2") > 0
numTwoX = numTwoX + 1
end
if cmp(strX[i:i],"3") > 0
numThreeX = numThreeX + 1
end
if cmp(strX[i:i],"4") > 0
numFourX = numFourX + 1
end
if cmp(strX[i:i],"5") > 0
numFiveX = numFiveX + 1
end
if cmp(strX[i:i],"6") > 0
numSixX = numSixX + 1
end
if cmp(strX[i:i],"7") > 0
numSevenX = numSevenX + 1
end
if cmp(strX[i:i],"8") > 0
numEightX = numEightX + 1
end
if cmp(strX[i:i],"9") > 0
numNineX = numNineX + 1
end
end

for i in 1:length(strY)
if cmp(strY[i:i],"0") > 0
numZeroY = numZeroY + 1
end
if cmp(strY[i:i],"1") > 0
numOneY = numOneY + 1 
end
if cmp(strY[i:i],"2") > 0
numTwoY = numTwoY + 1
end
if cmp(strY[i:i],"3") > 0
numThreeY = numThreeY + 1
end
if cmp(strY[i:i],"4") > 0
numFourY = numFourY + 1
end
if cmp(strY[i:i],"5") > 0
numFiveY = numFiveY + 1
end
if cmp(strY[i:i],"6") > 0
numSixY = numSixY + 1
end
if cmp(strY[i:i],"7") > 0
numSevenY = numSevenY + 1
end
if cmp(strY[i:i],"8") > 0
numEightY = numEightY + 1
end
if cmp(strY[i:i],"9") > 0
numNineY = numNineY + 1
end
end

if numOneX == numOneY && numTwoX == numTwoY && numThreeX == numThreeY && numFourX == numFourY && numFiveX == numFiveY && numSixX == numSixY && numSevenX == numSevenY && numEightX == numEightY && numNineX == numNineY
return 1
end
return 0
end
function twoXisPerm(p::Int)
if isPerm(p,2*p) > 0
return 1
end
return 0
end
function threeXisPerm(p::Int)
if isPerm(p,3*p) > 0
return 1
end
return 0
end
function fourXisPerm(p::Int)
if isPerm(p,4*p) > 0
return 1
end
return 0
end
function fiveXisPerm(p::Int)
if isPerm(p,5*p) > 0
return 1
end
return 0
end
function sixXisPerm(p::Int)
if isPerm(p,6*p) > 0
return 1
end
return 0
end
function main()
x = 125874
solution = 0
while true
if ((twoXisPerm(x) > 0) && (threeXisPerm(x) > 0) && (fourXisPerm(x) > 0) && (fiveXisPerm(x) > 0) && (sixXisPerm(x) > 0))
global solution = x
break
end
x = x + 1
end
end
@time begin
main()
end
#run @time twice to ignore compilation overhead
@time begin 
main()
end
print("Solution: ", solution)
print("nnProgram completed in")

在上面代码的底部，您可以看到我运行了两次@time以避免编译开销。

我想让输出看起来像下面这样:

Solution: 142857
Program completed in 89 milliseconds.

然而，使用@time函数或任何其他BenchmarkTools函数似乎总是直接将时间打印到终端。

0.121307 seconds (3.42 M allocations: 110.138 MiB, 14.35% gc time, 10.43% compilation time)
0.089670 seconds (3.40 M allocations: 108.961 MiB, 5.16% gc time)

是否有可能避免自动打印执行时间到终端，而是存储到一个变量?

Answer 1

使用@elapsed宏代替。例如:

julia> t = @elapsed rand(10^6);
julia> print("rand executed in $t seconds")
rand executed in 0.0016686 seconds