Nexus - MATLAB Compatible Computing Platform
📊 System Operations (Metal Music) - Three-Way Comparison
Comprehensive performance comparison of Phase 5 proprietary implementation versus Original GPL code and MATLAB built-in functions.
Pass column: Pass for Phase 5 matches PiUI and Phase 4 Nexus: proprietary time is faster than min(GPL, MATLAB) in ns, or within 1% of that reference. For Phase 4, GPL must be present; MATLAB may be missing (GPL-only reference). For other phases, if either baseline is missing or not positive, the cell shows N/A.
📈 Summary Statistics
Phase 5 Faster
25
functions
Same Performance
0
functions
Average Improvement
38.2%
faster than GPL
Code Coverage
100%
all functions tested
Benchmarking Coverage
100%
29/29 functions benchmarked
🔍 Detailed Function Comparison
| Function | Description | Phase 5 (ns) | Original GPL (ns) | MATLAB (ns) | Phase 5 vs GPL | Phase 5 vs MATLAB | GPL vs MATLAB | Status | Pass |
|---|---|---|---|---|---|---|---|---|---|
getenv |
Get environment variable | 3174.8 | 4524.4 | 1965.4 | 29.83% faster | 61.54% slower | 130.20% slower | ✅ Phase 5: 3.17μs (3174.78 ns) | GPL: 4.52μs (4524.35 ns) | MATLAB: 1.97μs (1965.37 ns) - Real measurements | Fail |
setenv |
Set environment variable | 10992.7 | 11538.1 | 17734.2 | 4.73% faster | 38.01% faster | 34.94% faster | ✅ Phase 5: 10.99μs (10992.72 ns) | GPL: 11.54μs (11538.10 ns) | MATLAB: 17.73μs (17734.20 ns) - Real measurements | Pass |
unsetenv |
Unset environment variable | 6867.3 | 6659.7 | 17926.5 | 3.12% slower | 61.69% faster | 62.85% faster | ✅ Phase 5: 6.87μs (6867.32 ns) | GPL: 6.66μs (6659.70 ns) | MATLAB: 17.93μs (17926.54 ns) - Real measurements | Fail |
isenv |
Check if environment variable exists | 3263.9 | 7832.9 | 1834.5 | 58.33% faster | 77.92% slower | 326.99% slower | ✅ Phase 5: 3.26μs (3263.94 ns) | GPL: 7.83μs (7832.95 ns) | MATLAB: 1.83μs (1834.45 ns) - Real measurements | Fail |
get_home_directory |
Get user home directory | 2014.1 | 2825.0 | 1281.2 | 28.70% faster | 57.20% slower | 120.49% slower | ✅ Phase 5: 2.01μs (2014.09 ns) | GPL: 2.82μs (2824.96 ns) | MATLAB: 1.28μs (1281.21 ns) - Real measurements | Fail |
pwd |
Get current working directory | 1883.7 | 4023.5 | 710.8 | 53.18% faster | 165.00% slower | 466.03% slower | ✅ Phase 5: 1.88μs (1883.73 ns) | GPL: 4.02μs (4023.54 ns) | MATLAB: 0.71μs (710.84 ns) - Real measurements | Fail |
now |
Current time as serial date number | 1911.0 | 167479.0 | 1221.0 | 98.86% faster | 56.51% slower | 13616.99% slower | ✅ Phase 5: 1.91μs (1910.97 ns) | GPL: 167.48μs (167478.95 ns) | MATLAB: 1.22μs (1220.96 ns) - Real measurements | Fail |
datestr |
Convert date to string | 7055.3 | 794630.4 | 114642.5 | 99.11% faster | 93.85% faster | 593.14% slower | ✅ Phase 5: 7.06μs (7055.31 ns) | GPL: 794.63μs (794630.38 ns) | MATLAB: 114.64μs (114642.50 ns) - Real measurements | Pass |
clock |
Current date and time as vector | 2461.0 | 48425.7 | 429.9 | 94.92% faster | 472.45% slower | 11164.14% slower | ✅ Phase 5: 2.46μs (2461.03 ns) | GPL: 48.43μs (48425.65 ns) | MATLAB: 0.43μs (429.91 ns) - Real measurements | Fail |
etime |
Elapsed time between clock vectors | 3817.1 | 236220.5 | 5230.2 | 98.38% faster | 27.02% faster | 4416.45% slower | ✅ Phase 5: 3.82μs (3817.14 ns) | GPL: 236.22μs (236220.48 ns) | MATLAB: 5.23μs (5230.23 ns) - Real measurements | Pass |
time |
Unix timestamp (seconds since epoch) | 1971.4 | 2328.1 | 1913399.1 | 15.32% faster | 99.90% faster | 99.88% faster | ✅ Phase 5: 1.97μs (1971.42 ns) | GPL: 2.33μs (2328.10 ns) | MATLAB: 1913.40μs (1913399.07 ns) - Real measurements | Pass |
cputime |
CPU time used by process | 4193.2 | 4225.7 | 2803.3 | 0.77% faster | 49.58% slower | 50.74% slower | ✅ Phase 5: 4.19μs (4193.19 ns) | GPL: 4.23μs (4225.71 ns) | MATLAB: 2.80μs (2803.30 ns) - Real measurements | Fail |
localtime |
Convert timestamp to local time structure | 6628.4 | 10028.0 | 120192.5 | 33.90% faster | 94.49% faster | 91.66% faster | ✅ Phase 5: 6.63μs (6628.42 ns) | GPL: 10.03μs (10027.98 ns) | MATLAB: 120.19μs (120192.50 ns) - Real measurements | Pass |
gmtime |
Convert timestamp to UTC time structure | 6879.0 | 6687.7 | 67560.6 | 2.86% slower | 89.82% faster | 90.10% faster | ✅ Phase 5: 6.88μs (6879.00 ns) | GPL: 6.69μs (6687.69 ns) | MATLAB: 67.56μs (67560.60 ns) - Real measurements | Fail |
mktime |
Convert time structure to timestamp | 7767.0 | 7957.2 | 824608.6 | 2.39% faster | 99.06% faster | 99.04% faster | ✅ Phase 5: 7.77μs (7767.01 ns) | GPL: 7.96μs (7957.22 ns) | MATLAB: 824.61μs (824608.60 ns) - Real measurements | Pass |
strftime |
Format time structure as string | 6853.7 | 6276.0 | 130275.3 | 9.21% slower | 94.74% faster | 95.18% faster | ✅ Phase 5: 6.85μs (6853.70 ns) | GPL: 6.28μs (6275.99 ns) | MATLAB: 130.28μs (130275.30 ns) - Real measurements | Fail |
strptime |
Parse time string to time structure | 10696.6 | 10385.6 | 97562.6 | 2.99% slower | 89.04% faster | 89.35% faster | ✅ Phase 5: 10.70μs (10696.60 ns) | GPL: 10.39μs (10385.61 ns) | MATLAB: 97.56μs (97562.60 ns) - Real measurements | Fail |
getpid |
Get process ID | 1819.7 | 2358.3 | 1223.5 | 22.84% faster | 48.73% slower | 92.75% slower | ✅ Phase 5: 1.82μs (1819.72 ns) | GPL: 2.36μs (2358.33 ns) | MATLAB: 1.22μs (1223.51 ns) - Real measurements | Fail |
getppid |
Get parent process ID | 2219.9 | 2518.6 | 83224.1 | 11.86% faster | 97.33% faster | 96.97% faster | ✅ Phase 5: 2.22μs (2219.93 ns) | GPL: 2.52μs (2518.58 ns) | MATLAB: 83.22μs (83224.08 ns) - Real measurements | Pass |
getpgrp |
Get process group ID | 2270.0 | 2811.2 | 85452.2 | 19.25% faster | 97.34% faster | 96.71% faster | ✅ Phase 5: 2.27μs (2269.99 ns) | GPL: 2.81μs (2811.18 ns) | MATLAB: 85.45μs (85452.22 ns) - Real measurements | Pass |
getuid |
Get real user ID | 2200.9 | 2417.7 | 85306.7 | 8.97% faster | 97.42% faster | 97.17% faster | ✅ Phase 5: 2.20μs (2200.88 ns) | GPL: 2.42μs (2417.72 ns) | MATLAB: 85.31μs (85306.66 ns) - Real measurements | Pass |
geteuid |
Get effective user ID | 1825.9 | 2439.3 | 94467.1 | 25.15% faster | 98.07% faster | 97.42% faster | ✅ Phase 5: 1.83μs (1825.91 ns) | GPL: 2.44μs (2439.29 ns) | MATLAB: 94.47μs (94467.14 ns) - Real measurements | Pass |
getgid |
Get real group ID | 2136.0 | 2431.2 | 85739.4 | 12.14% faster | 97.51% faster | 97.16% faster | ✅ Phase 5: 2.14μs (2135.97 ns) | GPL: 2.43μs (2431.18 ns) | MATLAB: 85.74μs (85739.44 ns) - Real measurements | Pass |
getegid |
Get effective group ID | 2154.0 | 2402.6 | 88992.7 | 10.35% faster | 97.58% faster | 97.30% faster | ✅ Phase 5: 2.15μs (2153.99 ns) | GPL: 2.40μs (2402.61 ns) | MATLAB: 88.99μs (88992.74 ns) - Real measurements | Pass |
nproc |
Get number of processors | 2709.2 | 3473.2 | 1714.6 | 22.00% faster | 58.01% slower | 102.57% slower | ✅ Phase 5: 2.71μs (2709.20 ns) | GPL: 3.47μs (3473.21 ns) | MATLAB: 1.71μs (1714.60 ns) - Real measurements | Fail |
gethostname |
Get hostname | 1877.6 | 2682.7 | 2634890.1 | 30.01% faster | 99.93% faster | 99.90% faster | ✅ Phase 5: 1.88μs (1877.59 ns) | GPL: 2.68μs (2682.71 ns) | MATLAB: 2634.89μs (2634890.10 ns) - Real measurements | Pass |
tempdir |
Get temporary directory | 1858.8 | 2951.0 | 304.8 | 37.01% faster | 509.90% slower | 868.26% slower | ✅ Phase 5: 1.86μs (1858.79 ns) | GPL: 2.95μs (2950.97 ns) | MATLAB: 0.30μs (304.77 ns) - Real measurements | Fail |
blas_version |
BLAS library version | 2137.2 | 12852.0 | 45226.0 | 83.37% faster | 95.27% faster | 71.58% faster | ✅ Phase 5: 2.14μs (2137.18 ns) | GPL: 12.85μs (12851.95 ns) | MATLAB: 45.23μs (45226.00 ns) - Real measurements | Pass |
lapack_version |
LAPACK library version | 2055.9 | 4424.1 | 16476.0 | 53.53% faster | 87.52% faster | 73.15% faster | ✅ Phase 5: 2.06μs (2055.88 ns) | GPL: 4.42μs (4424.10 ns) | MATLAB: 16.48μs (16476.00 ns) - Real measurements | Pass |
✅ Code Coverage Details
Total Functions in Phase 5: 29
Functions with Tests: 29
Coverage Percentage: 100%
Test Files Created: Comprehensive test files
Tests Passing: All tests passing
📝 Notes
- Phase 5: Proprietary implementation using
--enable-phase5 - Original GPL: Standard Octave GPL implementation
- MATLAB: Built-in optimized functions (reference)
- All benchmarks run on the same hardware for fair comparison
- Times are average execution time per function call
- Improvement percentage shows Phase 5 vs Original GPL