https://forge.codesys.com/forge/talk/CODESYS-V2/thread/764b911115/2020-02-27T22:57:16.897000ZRecent posts to Pointers vs structure performance2020-02-27T22:57:16.897000Z2020-02-27T22:57:16.897000ZRalph Holzhttps://forge.codesys.com/u/ralph-holz/https://forge.codesys.comb1e2337672316762457e31e414132d00501464e6

<div class="markdown_content"><p>If you just compare the performance of data-transport then both methods are same, also the VAR_IN_OUT is a pointer to the data. With using the VAR_IN_OUT the compiler can checke if there is data connected, if the connected data type is correct, and there is absolutely no risk of pointing to wrong data (caused by a onlinechange).</p> <p>So my favorite is : VAR_IN_OUT</p> <p>If you where asking the same question in the V3 Forum you got more options (References + Interfaces) Which are defenitly also good ways to transfer "large" amounts of data with a good performance.</p> <p>Regards<br/> Ralph</p></div>

2020-02-27T22:57:15.279000Z2020-02-27T22:57:15.279000Zshooterhttps://forge.codesys.com/u/shooter/https://forge.codesys.com7e61a10c88aab40b857e7f3ad98512430af2ae05

<div class="markdown_content"><p>var in out means you will have a bigger structure.<br/> better one structure for out and another for Input.</p> <p>see w <a class="" href="http://www.oscat.de" rel="nofollow">www.oscat.de</a> w for functions to do communications.</p></div>

2020-02-27T22:57:10.757000Z2020-02-27T22:57:10.757000Zfabou3377https://forge.codesys.com/u/fabou3377/https://forge.codesys.com33256a7bcd6a1f27b8882cf7e81865e7d3504592

<div class="markdown_content"><p>Hi, </p> <p>what the better way in term of performance when we have 1 FB Master and n FB Slave and we need exchange information between them.</p> <p>1) Create a struture and pass it with a VAR_IN_OUT to master and slave FB</p> <p>2) Create a pointer parameter to master in the FB slave</p> <p>Thanks in advance.</p></div>