On 11/04/2016 01:12 PM, Andrei Alexandrescu wrote:
So I'm working on the checkedint pull request (really need to get that
in...) and was trying to get some benchmarks going with ldc. The stock
ldc on mint is outdated and it can't compile the code, so I needed to do
a self-installation. I've put it in ~/bin/ldc2-1.1.0-beta3-linux-x86. Then:
$ PATH=~/bin/ldc2-1.1.0-beta3-linux-x86/bin:$PATH
Found the problem, sorry for the distraction. I'd downloaded the 32-bit
version not the 64-bit one. I got it working with the right download.
BTW the benchmark results have been pretty good:
======================================
Running trialPrimes() benchmark...
int: 37 ms, 789 μs, and 8 hnsecs
Checked!(int, void): 25 ms and 398 μs
Checked!(int, Warn): 64 ms, 653 μs, and 9 hnsecs
uint: 42 ms, 361 μs, and 1 hnsec
Checked!(uint, void): 42 ms, 49 μs, and 5 hnsecs
Checked!(uint, Warn): 72 ms, 322 μs, and 7 hnsecs
long: 67 ms and 893 μs
Checked!(long, void): 54 ms, 512 μs, and 3 hnsecs
Checked!(long, Warn): 91 ms and 932 μs
ulong: 69 ms and 567 μs
Checked!(ulong, void): 69 ms, 136 μs, and 4 hnsecs
Checked!(ulong, Warn): 95 ms, 196 μs, and 7 hnsecs
DONE
Running collatzSort() benchmark...
int: 43 ms, 967 μs, and 9 hnsecs
Checked!(int, void): 44 ms, 104 μs, and 8 hnsecs
Checked!(int, Warn): 81 ms, 833 μs, and 1 hnsec
uint: 43 ms, 398 μs, and 3 hnsecs
Checked!(uint, void): 43 ms, 560 μs, and 6 hnsecs
Checked!(uint, Warn): 82 ms, 727 μs, and 7 hnsecs
long: 43 ms, 208 μs, and 4 hnsecs
Checked!(long, void): 43 ms, 734 μs, and 5 hnsecs
Checked!(long, Warn): 83 ms, 868 μs, and 5 hnsecs
ulong: 43 ms, 459 μs, and 4 hnsecs
Checked!(ulong, void): 43 ms, 544 μs, and 5 hnsecs
Checked!(ulong, Warn): 84 ms, 567 μs, and 7 hnsecs
DONE
======================================
The Checked!(int, void) type is a checkedint that just "goes through"
the framework (it's a wrapper struct that doesn't insert any checks) and
to ldc's credit it gets optimized to pretty much a built-in int.
The Checked!(int, Warn) type inserts all checks necessary to print a
warning to stderr in case anything wrong happens. We're looking at a 2x
speed reduction, which is up to par with Thomas' library
(https://code.dlang.org/packages/checkedint). I've tried to run the
corresponding test for that and ran into a snag. It does work with dmd
but not with my locally-installed ldc. Any idea on what could be
happening? Here's the trace:
$dub run checkedint:tests --build=release --verbose
--compiler=$HOME/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2
Using dub registry url 'http://code.dlang.org/'
Refreshing local packages (refresh existing: true)...
Looking for local package map at /var/lib/dub/packages/local-packages.json
Looking for local package map at
/home/andrei/.dub/packages/local-packages.json
No package found in current working directory.
Building package checkedint:tests in
/home/andrei/.dub/packages/checkedint-0.5.3/tests/
Refreshing local packages (refresh existing: false)...
Looking for local package map at /var/lib/dub/packages/local-packages.json
Looking for local package map at
/home/andrei/.dub/packages/local-packages.json
Found dependency checkedint 0.5.3
Checking for missing dependencies.
Refreshing local packages (refresh existing: false)...
Looking for local package map at /var/lib/dub/packages/local-packages.json
Looking for local package map at
/home/andrei/.dub/packages/local-packages.json
Found dependency checkedint 0.5.3
Checking for upgrades.
Using cached upgrade results...
Generating using build
Generate target checkedint:tests (executable
/home/andrei/.dub/packages/checkedint-0.5.3/tests checkedint_tests)
Generate target checkedint (staticLibrary
/home/andrei/.dub/packages/checkedint-0.5.3 checkedint)
Performing "release" build using
/home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 for x86_64.
Target
'/home/andrei/.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a'
doesn't exist, need rebuild.
checkedint 0.5.3: building configuration "library"...
/home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 -lib
-of.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a
-release -enable-inlining -O -ignore -w -oq -od=.dub/obj
-d-version=Have_checkedint -I.dub/packages/checkedint-0.5.3/source/
.dub/packages/checkedint-0.5.3/source/checkedint/asserts.d
.dub/packages/checkedint-0.5.3/source/checkedint/flags.d
.dub/packages/checkedint-0.5.3/source/checkedint/noex.d
.dub/packages/checkedint-0.5.3/source/checkedint/package.d
.dub/packages/checkedint-0.5.3/source/checkedint/throws.d
.dub/packages/checkedint-0.5.3/source/checkedint/traits.d
.dub/packages/checkedint-0.5.3/source/future/bitop.d
.dub/packages/checkedint-0.5.3/source/future/math.d
.dub/packages/checkedint-0.5.3/source/future/traits0.d
Error: failed to create path to file:
.dub/obj/.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/libcheckedint.a
No such file or directory
FAIL
.dub/packages/checkedint-0.5.3/.dub/build/library-release-linux.posix-x86_64-ldc_0-34AC553328DC970F29AC41DDB38D09AB/
checkedint staticLibrary
/home/andrei/bin/ldc2-1.1.0-beta3-linux-x86_64/bin/ldc2 failed with exit
code 1.
Andrei
