Are there any JIT mode optimizations flags?

[ArtemkaKun]

Hi, I'm trying to compare daScript performance with the performance of my programming language (Spawn) in the Fibonacci example. daScript's performance info states the following:

daScript Just-in-Time compilation is based on LLVM backend, and often outperforms C++, due to daScript providing more information to LLVM than AOT. 

and provides the following table

daScript code I'm benchmarking is the following:

def fibI(n)
    var last = 1
    var cur = 0
    for i in range(n)
        let tmp = cur
        cur += last
        last = tmp
    return cur

[export]
def main
    print("{fibI(6511134)}")

I'm running it with just das fibI.das

Spawn code is the following:

fn main() {
    print('${fib_i(6511134)}')
}

fn fib_i(n u64) -> u64 {
    mut last := 1
    mut cur := 0

    for i in 0 .. n {
        tmp := cur
    cur += last
    last = tmp
    }

    return cur
}

I'm building executable with ./spawnlang --cc clang --opt-fast --show-timings=false -o fib_sp ../fibI.sp

I'm comparing both daScript and Spawn using hyperfine hyperfine -N --warmup 5 "das fibI.das" ../../spawn/fib_sp The results are the following

Benchmark 1: das fibI.das
Time (mean ± σ):     292.5 ms ±  11.0 ms    [User: 276.2 ms, System: 13.6 ms]
Range (min … max):   275.4 ms … 319.6 ms    10 runs

Benchmark 2: ../../spawn/fib_sp
Time (mean ± σ):       4.5 ms ±   0.6 ms    [User: 3.1 ms, System: 1.1 ms]
Range (min … max):     2.2 ms …   5.9 ms    574 runs

Summary
../../spawn/fib_sp ran
64.72 ± 8.79 times faster than das fibI.das

Am I doing something wrong? Should I add any optimization flags to daScript build command or something? I can't try AOT for now (see #1119), but seems JIT mode of daScript should perform sometimes better than AOT mode, and I have drastically difference in comparison with my compiled programming language that should have similar performance as AOT

I'm on Arch Linux, with lastest GCC and Clang and dev tools

[ArtemkaKun]

I found options optimize=true in https://spiiin.github.io/blog/2115627465/ and added it on the top of my file, but seems this changed nothing in term of performance

[borisbat]

das -jit fibI.das it runs interpreted otherwise

[ArtemkaKun]

Hi, thanks for the response. Unfortunately, this doesn't work for me

╰─λ das -jit fibI.das
failed to add extra dependency just_in_time from /home/yuart/Projects/daScript/daslib/just_in_time.das
function 'main' not found

[borisbat]

u'r missing dasLLVM submodule

[ArtemkaKun]

Hmm, when running python modules.py --path ./build --on dasLLVM from the root of the daScript repo folder, I have the following output

🔴] × python modules.py --path ./build --on dasLLVM
/home/yuart/Projects/daScript/modules.py:238: SyntaxWarning: invalid escape sequence '\d'
description='''This is cmake/git configuration tool.
CMake Warning at modules/dasClangBind/CMakeLists.txt:6 (message):
can't find libclang at /home/yuart/Projects/daScript/../libclang
Call Stack (most recent call first):
CMakeLists.txt:273 (INCLUDE)

-- dasGlsl module included.
CMake Warning at modules/dasLLVM/CMakeLists.txt:4 (message):
can't find libclang at /home/yuart/Projects/daScript/../libclang
Call Stack (most recent call first):
CMakeLists.txt:273 (INCLUDE)

-- dasOpenAI module included.
-- dasOpenGL module included.
-- dasPEG module included.
-- dasStbImage module included.
REGISTER DAS MODULE libDasModuleStbImage
-- dasStbTrueType module included.
REGISTER DAS MODULE libDasModuleStbTrueType
-- dasStdDlg module included.
REGISTER DAS MODULE libDasModuleStdDlg
-- dasTELEGRAM module included.
-- FLEX `2.6.4` found
-- BISON `3.8.2` found
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- Configuring done (0.4s)
-- Generating done (0.1s)
-- Build files have been written to: /home/yuart/Projects/daScript
dasLLVM turned on successfully (see log above)!

Q - exit, U - update list, D - disable all modules, arrows/J/K - navigation, enter - toggle module state
- : dasAudio
- : dasBGFX
- : dasClangBind
+ : dasGlfw
: dasGlsl - option for this module is unknown
- : dasHV
- : dasImgui
-> - : dasLLVM
- : dasMinfft
: dasOpenAI - option for this module is unknown
: dasOpenGL - option for this module is unknown
: dasPEG - option for this module is unknown
: dasPUGIXML - option for this module is unknown
- : dasQuirrel
- : dasSFML
: dasSQLITE - option for this module is unknown
+ : dasStbImage
+ : dasStbTrueType
+ : dasStdDlg
: dasTelegram - option for this module is unknown
- : dasXbyak

What exactly is libclang?

[borisbat]

installation of LLVM. 16.0.6 inside looks like this

02/29/2024  10:26 AM    <DIR>          bin
11/03/2023  10:56 PM    <DIR>          include
02/29/2024  10:26 AM    <DIR>          lib
02/29/2024  10:26 AM    <DIR>          libexec
02/29/2024  10:26 AM    <DIR>          share

[ArtemkaKun]

Ok, trying

[ArtemkaKun]

I downloaded llvm-18.1.6.src.tar.xz from https://github.com/llvm/llvm-project/releases/tag/llvmorg-18.1.6, and just renamed it into libclang and placed to suitable place.

Its content

Now python modules.py --path ./build --on dasLLVM outputs the following

/home/yuart/Projects/daScript/modules.py:238: SyntaxWarning: invalid escape sequence '\d'
description='''This is cmake/git configuration tool.
-- dasClangBind module included.
LIBCLANG_INCLUDE at /home/yuart/Projects/daScript/../libclang/include
LIBCLANG_LIB at /home/yuart/Projects/daScript/../libclang/lib
REGISTER DAS MODULE libDasModuleClangBind
-- dasGlsl module included.
-- dasLlvm module included.
LIBCLANG_INCLUDE at /home/yuart/Projects/daScript/../libclang/include
LIBCLANG_LIB at /home/yuart/Projects/daScript/../libclang/lib
REGISTER DAS MODULE libDasModuleLlvm
-- dasOpenAI module included.
-- dasOpenGL module included.
-- dasPEG module included.
-- dasStbImage module included.
REGISTER DAS MODULE libDasModuleStbImage
-- dasStbTrueType module included.
REGISTER DAS MODULE libDasModuleStbTrueType
-- dasStdDlg module included.
REGISTER DAS MODULE libDasModuleStdDlg
-- dasTELEGRAM module included.
-- FLEX `2.6.4` found
-- BISON `3.8.2` found
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- File is not changed. Generation skipped.
-- Configuring done (0.4s)
CMake Error at modules/dasLLVM/CMakeLists.txt:133 (ADD_LIBRARY):
Cannot find source file:

/home/yuart/Projects/daScript/modules/dasLlvm/src/cb_dasLLVM.h

Tried extensions .c .C .c++ .cc .cpp .cxx .cu .mpp .m .M .mm .ixx .cppm
.ccm .cxxm .c++m .h .hh .h++ .hm .hpp .hxx .in .txx .f .F .for .f77 .f90
.f95 .f03 .hip .ispc
Call Stack (most recent call first):
CMakeLists.txt:273 (INCLUDE)

CMake Error at modules/dasLLVM/CMakeLists.txt:133 (ADD_LIBRARY):
No SOURCES given to target: libDasModuleLlvm
Call Stack (most recent call first):
CMakeLists.txt:273 (INCLUDE)

CMake Generate step failed.  Build files cannot be regenerated correctly.
ERROR: there was an error executing 'cmake -DDAS_LLVM_DISABLED:BOOL=OFF /home/yuart/Projects/daScript'

[ArtemkaKun]

Hmm, but the file is present

[borisbat]

https://t.me/daScript since this is turning into chat