digitalmars.D.learn - Debugging compile time memory usage
- Kamil Koczurek (17/17) Jun 24 2018 I recently wrote a brainfuck compiler in D, which loads the BF
- Stefan Koch (6/24) Jun 24 2018 Check out https://github.com/UplinkCoder/bf-ctfe.
- Nicholas Wilson (7/25) Jun 25 2018 If you were able to compile it with LDC and not DMD, then that is
- Bauss (4/12) Jun 25 2018 Is there a specific reason why DMD isn't shipped as 64bit by
I recently wrote a brainfuck compiler in D, which loads the BF source at compile time, performs some (simple) optimizations, translates everything to D and puts it into the source code with a mixin. I did manage to get some pretty good performance, but for some programs in brainfuck I have to use LDC instead of DMD because the latter runs out of memory. Is there a way for me to optimize my code in such a way that DMD will be able to compile it? D code: https://pastebin.com/fg1bqwnd BF program that works: https://github.com/erikdubbelboer/brainfuck-jit/blob/master/mandelbrot.bf BF program that makes DMD crash: https://github.com/fabianishere/brainfuck/blob/master/examples/hanoi.bf After putting BF code in code.bf and D in main.d, I compile it with the following command: dmd main.d -J./ Error msg: unable to fork: Cannot allocate memory DMD version: DMD64 D Compiler v2.080.0-dirty
Jun 24 2018
Stefan Koch <uplink.coder googlemail.com> On Sunday, 24 June 2018 at 14:16:26 UTC, Kamil Koczurek wrote:I recently wrote a brainfuck compiler in D, which loads the BF source at compile time, performs some (simple) optimizations, translates everything to D and puts it into the source code with a mixin. I did manage to get some pretty good performance, but for some programs in brainfuck I have to use LDC instead of DMD because the latter runs out of memory. Is there a way for me to optimize my code in such a way that DMD will be able to compile it? D code: https://pastebin.com/fg1bqwnd BF program that works: https://github.com/erikdubbelboer/brainfuck-jit/blob/master/mandelbrot.bf BF program that makes DMD crash: https://github.com/fabianishere/brainfuck/blob/master/examples/hanoi.bf After putting BF code in code.bf and D in main.d, I compile it with the following command: dmd main.d -J./ Error msg: unable to fork: Cannot allocate memory DMD version: DMD64 D Compiler v2.080.0-dirtyCheck out https://github.com/UplinkCoder/bf-ctfe. It uses all tricks which I know to use the least amount of memory. (Which admittedly still is a lot) Other then that. you'll have to wait for newCTFE to be stable enough for me to give green light for merging.
Jun 24 2018
On Sunday, 24 June 2018 at 14:16:26 UTC, Kamil Koczurek wrote:I recently wrote a brainfuck compiler in D, which loads the BF source at compile time, performs some (simple) optimizations, translates everything to D and puts it into the source code with a mixin. I did manage to get some pretty good performance, but for some programs in brainfuck I have to use LDC instead of DMD because the latter runs out of memory. Is there a way for me to optimize my code in such a way that DMD will be able to compile it? D code: https://pastebin.com/fg1bqwnd BF program that works: https://github.com/erikdubbelboer/brainfuck-jit/blob/master/mandelbrot.bf BF program that makes DMD crash: https://github.com/fabianishere/brainfuck/blob/master/examples/hanoi.bf After putting BF code in code.bf and D in main.d, I compile it with the following command: dmd main.d -J./ Error msg: unable to fork: Cannot allocate memory DMD version: DMD64 D Compiler v2.080.0-dirtyIf you were able to compile it with LDC and not DMD, then that is most likely due to the LDC executable being 64-bit (limited to available system RAM+swaps) and the DMD executable being 32-bit (limited to 4GB). If you want to use DMD, build a 64-bit version yourself and complain on general that the releases are not 64-bit.
Jun 25 2018
On Tuesday, 26 June 2018 at 00:59:24 UTC, Nicholas Wilson wrote:On Sunday, 24 June 2018 at 14:16:26 UTC, Kamil Koczurek wrote:Is there a specific reason why DMD isn't shipped as 64bit by default? Literally most machines are 64bit these days, so why do we limit ourselves to 32bit?[...]If you were able to compile it with LDC and not DMD, then that is most likely due to the LDC executable being 64-bit (limited to available system RAM+swaps) and the DMD executable being 32-bit (limited to 4GB). If you want to use DMD, build a 64-bit version yourself and complain on general that the releases are not 64-bit.
Jun 25 2018