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Re: Writing Bits object to disk [message #47950 is a reply to message #47948]

Wed, 26 April 2017 08:50

crydev is currently offline

crydev
Messages: 151
Registered: October 2012
Location: Netherlands

Experienced Member

Mirek,

I ran your benchmark, and I found out why I get different results! Your benchmark gives me:

TIMING Bits           : 194.98 ms - 194.98 us (195.00 ms / 1000 ), min:  0.00 ns, max:  1.00 ms, nesting: 1 - 1000
TIMING Vector<bool>   : 362.98 ms - 362.98 us (363.00 ms / 1000 ), min:  0.00 ns, max:  1.00 ms, nesting: 1 - 1000

Constructing the Vector<bool> inside the loop also slows down the whole thing by a lot. After I moved the construction out, I got:

TIMING Bits           : 183.98 ms - 183.98 us (184.00 ms / 1000 ), min:  0.00 ns, max:  1.00 ms, nesting: 1 - 1000
TIMING Vector<bool>   : 102.98 ms - 102.98 us (103.00 ms / 1000 ), min:  0.00 ns, max:  1.00 ms, nesting: 1 - 1000

I pre-allocate the Vector<bool> with the Reserve(int) function, because I know what the size of the vector is going to be. This is also the case in my production application. That's why the Vector is still faster. We need a reserve function for Bits too. Smile

Smile

crydev

[Updated on: Wed, 26 April 2017 08:54]

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[Message index]

		Writing Bits object to disk By: crydev on Wed, 11 January 2017 17:07
		Re: Writing Bits object to disk By: mr_ped on Thu, 12 January 2017 01:20
		Re: Writing Bits object to disk By: crydev on Thu, 12 January 2017 09:03
		Re: Writing Bits object to disk By: mirek on Fri, 13 January 2017 08:39
		Re: Writing Bits object to disk By: crydev on Wed, 18 January 2017 08:51
		Re: Writing Bits object to disk By: crydev on Mon, 24 April 2017 19:19
		Re: Writing Bits object to disk By: mirek on Mon, 24 April 2017 21:08
		Re: Writing Bits object to disk By: crydev on Tue, 25 April 2017 09:36
		Re: Writing Bits object to disk By: dolik.rce on Tue, 25 April 2017 09:48
		Re: Writing Bits object to disk By: mirek on Tue, 25 April 2017 10:31
		Re: Writing Bits object to disk By: mirek on Tue, 25 April 2017 10:34
		Re: Writing Bits object to disk By: crydev on Tue, 25 April 2017 11:37
		Re: Writing Bits object to disk By: mirek on Tue, 25 April 2017 11:59
		Re: Writing Bits object to disk By: mirek on Tue, 25 April 2017 12:38
		Re: Writing Bits object to disk By: crydev on Tue, 25 April 2017 13:35
		Re: Writing Bits object to disk By: mirek on Tue, 25 April 2017 13:39
		Re: Writing Bits object to disk By: crydev on Tue, 25 April 2017 14:03
		Re: Writing Bits object to disk By: mirek on Tue, 25 April 2017 16:40
		Re: Writing Bits object to disk By: crydev on Wed, 26 April 2017 08:27
		Re: Writing Bits object to disk By: crydev on Wed, 26 April 2017 08:50
		Re: Writing Bits object to disk By: mirek on Wed, 26 April 2017 13:38
		Re: Writing Bits object to disk By: crydev on Thu, 27 April 2017 10:31
		Re: Writing Bits object to disk By: mirek on Thu, 27 April 2017 23:50
		Re: Writing Bits object to disk By: crydev on Fri, 28 April 2017 19:04
		Re: Writing Bits object to disk By: mirek on Sat, 29 April 2017 09:05
		Re: Writing Bits object to disk By: omari on Fri, 28 April 2017 19:31
		Re: Writing Bits object to disk By: mirek on Sat, 29 April 2017 09:53
		Re: Writing Bits object to disk By: crydev on Tue, 02 May 2017 22:54
		Re: Writing Bits object to disk By: mirek on Tue, 02 May 2017 23:55
		Re: Writing Bits object to disk By: crydev on Wed, 03 May 2017 09:00
		Re: Writing Bits object to disk By: mirek on Wed, 03 May 2017 09:53
		Re: Writing Bits object to disk By: crydev on Wed, 03 May 2017 11:12
		Re: Writing Bits object to disk By: mirek on Wed, 03 May 2017 11:27
		Re: Writing Bits object to disk By: crydev on Wed, 03 May 2017 12:24
		Re: Writing Bits object to disk By: mirek on Wed, 03 May 2017 12:37
		Re: Writing Bits object to disk By: crydev on Wed, 03 May 2017 18:33
		Re: Writing Bits object to disk By: crydev on Sat, 06 May 2017 10:28
		Re: Writing Bits object to disk By: crydev on Tue, 16 May 2017 09:12
		Re: Writing Bits object to disk By: mirek on Tue, 16 May 2017 10:39
		Re: Writing Bits object to disk By: mirek on Tue, 16 May 2017 13:12
		Re: Writing Bits object to disk By: crydev on Tue, 16 May 2017 20:17

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