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AnswerRe: How to selected value of a dropbox column of a DataGridView programmatically? Pin
Richard MacCutchan13-Nov-20 1:55
mveRichard MacCutchan13-Nov-20 1:55 
GeneralRe: How to selected value of a dropbox column of a DataGridView programmatically? Pin
Richard Deeming13-Nov-20 2:06
mveRichard Deeming13-Nov-20 2:06 
GeneralRe: How to selected value of a dropbox column of a DataGridView programmatically? Pin
Richard MacCutchan13-Nov-20 2:16
mveRichard MacCutchan13-Nov-20 2:16 
GeneralRe: How to selected value of a dropbox column of a DataGridView programmatically? Pin
Alex Dunlop13-Nov-20 3:09
Alex Dunlop13-Nov-20 3:09 
AnswerRe: How to selected value of a dropbox column of a DataGridView programmatically? Pin
Gerry Schmitz13-Nov-20 4:10
mveGerry Schmitz13-Nov-20 4:10 
QuestionCommented code in c# forms does it affect the performance Pin
Sachin Kulkarni B12-Nov-20 4:50
Sachin Kulkarni B12-Nov-20 4:50 
AnswerRe: Commented code in c# forms does it affect the performance Pin
OriginalGriff12-Nov-20 5:08
mveOriginalGriff12-Nov-20 5:08 
GeneralRe: Commented code in c# forms does it affect the performance Pin
trønderen12-Nov-20 7:22
trønderen12-Nov-20 7:22 
Today, even "interpreted" languages are frequently JIT-precompiled into some "bytecode" which is then interpreted. In this step, comments are peeled off, and do not affect interpretation of bytecodes. Startup (i.e. the JIT compilation) may be a couple milliseconds slower if the source has many huge comment blocks, but that is a one-time operation; it is not repeated a thousand times if the comment was placed in a loop executed a thousand times.

Some systems cache the bytecode (e.g. for Python: in a .pyc file), so for the next execution of the program, you have no startup delay. (This resembles .net processing where the first use of a CIL assembly invokes a JIT compiler to build native code, which is cached. In the .net case, comments are peeled off in the initial compilation to CIL, and the JIT compilation is from an intermediate language (sort of like bytecode, but different) to native code.)

I guess there are still a number of systems that interpret source code directly, line by line. If a loop is iterated a thousand times, each source line is broken up into tokens, and their semantics determined, a thousand times. But such systems are getting fewer and fewer. Today, even Javascript / HTML is usually converted to some intermediate bytecode before execution.

I was working with Tcl (/Tk) at the time when JIT compilation was introduced, and made some timing tests, comparing the old directly-from-source interpretation against the JIT bytecode alternative. For loops executed a few thousand times, execution were in many cases 5-7 times faster with the bytecodes.
AnswerRe: Commented code in c# forms does it affect the performance Pin
Gerry Schmitz13-Nov-20 3:58
mveGerry Schmitz13-Nov-20 3:58 
QuestionThe name does not exist in the current context Pin
darkdxd11-Nov-20 22:04
darkdxd11-Nov-20 22:04 
AnswerRe: The name does not exist in the current context Pin
Richard Deeming11-Nov-20 23:01
mveRichard Deeming11-Nov-20 23:01 
AnswerRe: The name does not exist in the current context Pin
trønderen11-Nov-20 23:01
trønderen11-Nov-20 23:01 
AnswerRe: The name does not exist in the current context Pin
Richard MacCutchan11-Nov-20 23:03
mveRichard MacCutchan11-Nov-20 23:03 
AnswerRe: The name does not exist in the current context Pin
OriginalGriff11-Nov-20 23:06
mveOriginalGriff11-Nov-20 23:06 
QuestionHow to find days between a defined date and now? Pin
Alex Dunlop10-Nov-20 7:51
Alex Dunlop10-Nov-20 7:51 
AnswerRe: How to find days between a defined date and now? Pin
Richard MacCutchan10-Nov-20 8:56
mveRichard MacCutchan10-Nov-20 8:56 
GeneralRe: How to find days between a defined date and now? Pin
Alex Dunlop10-Nov-20 16:48
Alex Dunlop10-Nov-20 16:48 
GeneralRe: How to find days between a defined date and now? Pin
Richard MacCutchan10-Nov-20 21:57
mveRichard MacCutchan10-Nov-20 21:57 
AnswerRe: How to find days between a defined date and now? Pin
Gerry Schmitz10-Nov-20 14:51
mveGerry Schmitz10-Nov-20 14:51 
GeneralRe: How to find days between a defined date and now? Pin
Alex Dunlop10-Nov-20 16:57
Alex Dunlop10-Nov-20 16:57 
GeneralRe: How to find days between a defined date and now? Pin
Gerry Schmitz10-Nov-20 18:11
mveGerry Schmitz10-Nov-20 18:11 
AnswerRe: How to find days between a defined date and now? Pin
Mycroft Holmes11-Nov-20 11:12
professionalMycroft Holmes11-Nov-20 11:12 
QuestionJSON "classes" repetitive Pin
Member 56973910-Nov-20 6:25
Member 56973910-Nov-20 6:25 
AnswerRe: JSON "classes" repetitive Pin
Gerry Schmitz10-Nov-20 7:24
mveGerry Schmitz10-Nov-20 7:24 
GeneralRe: JSON "classes" repetitive Pin
Member 56973910-Nov-20 8:06
Member 56973910-Nov-20 8:06 

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