### Benchmarks

Comparison of run times of the current version of MODFLOW 6 (6.8.0.dev0+9f92119) to the previous version (6.7.0). The current example models available from the [MODFLOW 6 Examples GitHub Repository](https://github.com/MODFLOW-ORG/modflow6-examples) are used to compare run times. Simulations that fail are indicated by '--'. The percent difference, where calculated, is relative to the simulation run time for the previous version. Percent differences for example problems with short run times (less than 30 seconds) may not be significant.

MODFLOW 6 compiled Jun  3 2026 22:08:29 with GCC version 12.3.0.


| Example Problem | Current Version 6.8.0.dev0+9f92119 | Previous Version 6.7.0 | Percent difference |
| :---------- | :----------: | :----------: | :----------: |
| ex-gwf-nwt-p03b | 2.245 Seconds | 2.273 Seconds | -1.23% |
| ex-gwf-maw-p03a | 0.099 Seconds | 0.100 Seconds | -1.00% |
| ex-gwf-disvmesh | 0.177 Seconds | 0.178 Seconds | -0.56% |
| ex-gwt-mt3dms-p03 | 1.720 Seconds | 1.699 Seconds | 1.24% |
| ex-gwt-mt3dms-p02b/mf6gwf | 0.258 Seconds | 0.260 Seconds | -0.77% |
| ex-gwt-mt3dms-p02b/mf6gwt | 0.409 Seconds | -- | -- |
| ex-gwt-mt3dms-p06 | 3.657 Seconds | 3.661 Seconds | -0.11% |
| ex-gwt-moc3d-p01b/mf6gwf | 0.008 Seconds | 0.008 Seconds | 0.00% |
| ex-gwt-moc3d-p01b/mf6gwt | 0.041 Seconds | -- | -- |
| ex-gwf-lgrv-lgr | 6.813 Seconds | 6.665 Seconds | 2.22% |
| ex-gwf-lgr | 0.087 Seconds | 0.089 Seconds | -2.25% |
| ex-gwf-lak-p02 | 6.961 Seconds | 6.922 Seconds | 0.56% |
| ex-gwf-nwt-p02b | 4.160 Seconds | 4.179 Seconds | -0.45% |
| ex-gwt-mt3dms-p01d | 0.040 Seconds | 0.041 Seconds | -2.44% |
| ex-gwf-u1gwfgwf-s4 | 0.020 Seconds | 0.021 Seconds | -4.76% |
| ex-gwt-mt3dsupp632a/mf6gwf | 0.009 Seconds | 0.009 Seconds | 0.00% |
| ex-gwt-mt3dsupp632a/mf6gwt | 0.046 Seconds | -- | -- |
| ex-gwt-mt3dsupp632c/mf6gwf | 0.009 Seconds | 0.010 Seconds | -10.00% |
| ex-gwt-mt3dsupp632c/mf6gwt | 0.035 Seconds | -- | -- |
| ex-gwf-bump-p01a | 0.414 Seconds | 0.423 Seconds | -2.13% |
| ex-gwf-u1gwfgwf-s3 | 0.021 Seconds | 0.023 Seconds | -8.70% |
| ex-gwe-bhe/mf6gwf | 0.034 Seconds | 0.034 Seconds | 0.00% |
| ex-gwe-bhe/mf6gwe | 4.713 Seconds | -- | -- |
| ex-gwt-gwtgwt-p10 | 1 Minutes,  6.058 Seconds | 1 Minutes,  6.072 Seconds | -0.02% |
| ex-gwt-hecht-mendez-c/mf6gwf | 1.844 Seconds | 1.849 Seconds | -0.27% |
| ex-gwt-hecht-mendez-c/mf6gwt | 1 Minutes, 21.622 Seconds | -- | -- |
| ex-gwf-u1disv | 0.010 Seconds | 0.010 Seconds | 0.00% |
| ex-gwf-csub-p02a | 0.035 Seconds | 0.036 Seconds | -2.78% |
| ex-gwe-geotherm/mf6gwf | 0.988 Seconds | 0.979 Seconds | 0.92% |
| ex-gwe-geotherm/mf6gwe | 33.503 Seconds | -- | -- |
| ex-gwt-moc3d-p02tg/mf6gwf | 0.639 Seconds | 0.637 Seconds | 0.31% |
| ex-gwt-moc3d-p02tg/mf6gwt | 19.253 Seconds | -- | -- |
| ex-gwt-henry-a | 6.745 Seconds | 6.781 Seconds | -0.53% |
| ex-gwf-nwt-p02a | 7.295 Seconds | 7.334 Seconds | -0.53% |
| ex-gwf-bump-p01b | 0.103 Seconds | 0.103 Seconds | 0.00% |
| ex-gwt-moc3d-p02/mf6gwf | 0.106 Seconds | 0.108 Seconds | -1.85% |
| ex-gwt-moc3d-p02/mf6gwt | 10.187 Seconds | -- | -- |
| ex-gwf-sfr-p01b | 8.311 Seconds | 8.337 Seconds | -0.31% |
| ex-prt-mp7-p01/gwf | 0.022 Seconds | 0.022 Seconds | 0.00% |
| ex-prt-mp7-p01/prt | 0.453 Seconds | -- | -- |
| ex-gwt-rotate | 3 Minutes, 46.696 Seconds | 3 Minutes, 49.361 Seconds | -1.16% |
| ex-gwe-danckwerts | 1.356 Seconds | 1.368 Seconds | -0.88% |
| ex-gwt-mt3dms-p02d/mf6gwf | 0.262 Seconds | 0.261 Seconds | 0.38% |
| ex-gwt-mt3dms-p02d/mf6gwt | 0.409 Seconds | -- | -- |
| ex-gwf-maw-p03c | 0.097 Seconds | 0.097 Seconds | 0.00% |
| ex-gwf-rad-disu | 0.054 Seconds | 0.055 Seconds | -1.82% |
| ex-gwf-capture | 0.020 Seconds | 0.021 Seconds | -4.76% |
| ex-gwf-bcf2ss-p02a | 0.014 Seconds | 0.015 Seconds | -6.67% |
| ex-gwf-csub-p02b | 0.038 Seconds | 0.038 Seconds | 0.00% |
| ex-gwf-bump-p01c | 0.071 Seconds | 0.073 Seconds | -2.74% |
| ex-gwf-hanir | 0.018 Seconds | 0.018 Seconds | 0.00% |
| ex-gwt-mt3dms-p05 | 0.192 Seconds | 0.197 Seconds | -2.54% |
| ex-gwf-bcf2ss-p01a | 0.016 Seconds | 0.015 Seconds | 6.67% |
| ex-gwt-synthetic-valley/mf6gwf | 3.239 Seconds | 3.253 Seconds | -0.43% |
| ex-gwt-synthetic-valley/mf6gwt | 28.810 Seconds | -- | -- |
| ex-gwt-mt3dms-p02a/mf6gwf | 0.260 Seconds | 0.262 Seconds | -0.76% |
| ex-gwt-mt3dms-p02a/mf6gwt | 0.547 Seconds | -- | -- |
| ex-gwt-prudic2004t2/mf6gwf | 1.752 Seconds | 1.759 Seconds | -0.40% |
| ex-gwt-prudic2004t2/mf6gwt | 22.651 Seconds | -- | -- |
| ex-gwt-hecht-mendez-b/mf6gwf | 1.633 Seconds | 1.638 Seconds | -0.31% |
| ex-gwt-hecht-mendez-b/mf6gwt | 1 Minutes,  6.473 Seconds | -- | -- |
| ex-gwf-sfr-p01 | 0.188 Seconds | 0.188 Seconds | 0.00% |
| ex-gwe-radial-slow/mf6gwf | 0.748 Seconds | 0.744 Seconds | 0.54% |
| mf6gwe-b | 42.566 Seconds | -- | -- |
| ex-gwf-csub-p03a | 10.284 Seconds | 10.293 Seconds | -0.09% |
| ex-gwt-mt3dms-p01a | 0.035 Seconds | 0.036 Seconds | -2.78% |
| ex-gwf-lgrv-gc | 0.297 Seconds | 0.301 Seconds | -1.33% |
| ex-prt-mp7-p03/gwf | 0.054 Seconds | 0.055 Seconds | -1.82% |
| ex-prt-mp7-p03/prt | 0.164 Seconds | -- | -- |
| ex-gwf-csub-p03b | 10.594 Seconds | 10.725 Seconds | -1.22% |
| ex-gwt-moc3d-p01c/mf6gwf | 0.009 Seconds | 0.009 Seconds | 0.00% |
| ex-gwt-moc3d-p01c/mf6gwt | 0.045 Seconds | -- | -- |
| ex-gwf-zaidel | 0.009 Seconds | 0.009 Seconds | 0.00% |
| ex-gwf-sfr-pindersauera | 1.262 Seconds | 1.244 Seconds | 1.45% |
| ex-gwf-spbc | 0.140 Seconds | 0.140 Seconds | 0.00% |
| ex-gwf-drn-p01b | 2.120 Seconds | 2.063 Seconds | 2.76% |
| ex-gwf-maw-p01b | 0.963 Seconds | 0.990 Seconds | -2.73% |
| ex-gwt-keating/mf6gwf | 5.765 Seconds | 5.798 Seconds | -0.57% |
| ex-gwt-keating/mf6gwt | 43.832 Seconds | -- | -- |
| ex-gwt-keating/mf6prt | 0.096 Seconds | -- | -- |
| ex-gwt-mt3dms-p02c/mf6gwf | 0.263 Seconds | 0.260 Seconds | 1.15% |
| ex-gwt-mt3dms-p02c/mf6gwt | 0.331 Seconds | -- | -- |
| ex-gwf-csub-p04 | 1.790 Seconds | 1.751 Seconds | 2.23% |
| ex-gwt-mt3dms-p04a | 6.667 Seconds | 6.758 Seconds | -1.35% |
| ex-gwf-u1gwfgwf-s1 | 0.016 Seconds | 0.016 Seconds | 0.00% |
| ex-gwt-uzt-2d-a | 9.424 Seconds | 9.195 Seconds | 2.49% |
| ex-gwt-mt3dsupp632b/mf6gwf | 0.009 Seconds | 0.010 Seconds | -10.00% |
| ex-gwt-mt3dsupp632b/mf6gwt | 0.047 Seconds | -- | -- |
| ex-gwt-mt3dms-p07 | 0.405 Seconds | 0.399 Seconds | 1.50% |
| ex-gwf-hanix | 0.038 Seconds | 0.038 Seconds | 0.00% |
| ex-gwf-csub-p01 | 0.127 Seconds | 0.122 Seconds | 4.10% |
| ex-gwf-drn-p01a | 1.489 Seconds | 1.478 Seconds | 0.74% |
| ex-gwe-vsc | 8.442 Seconds | 8.511 Seconds | -0.81% |
| gwf_voronoi | 0.107 Seconds | 0.107 Seconds | 0.00% |
| gwf_triangle | 0.060 Seconds | 0.060 Seconds | 0.00% |
| gwf_structured | 0.063 Seconds | 0.063 Seconds | 0.00% |
| gwt_triangle_square-wave_central | 0.461 Seconds | -- | -- |
| gwt_structured_step-wave_tvd | 0.963 Seconds | -- | -- |
| gwt_structured_sin2-wave_upstream | 0.230 Seconds | -- | -- |
| gwt_structured_square-wave_tvd | 1.299 Seconds | -- | -- |
| gwt_triangle_step-wave_utvd | 3.037 Seconds | -- | -- |
| gwt_voronoi_square-wave_utvd | 3.708 Seconds | -- | -- |
| gwt_structured_sin2-wave_central | 0.276 Seconds | -- | -- |
| gwt_triangle_sin2-wave_upstream | 0.442 Seconds | -- | -- |
| gwt_voronoi_step-wave_tvd | 4.072 Seconds | -- | -- |
| gwt_voronoi_sin2-wave_tvd | 3.979 Seconds | -- | -- |
| gwt_voronoi_square-wave_tvd | 4.205 Seconds | -- | -- |
| gwt_voronoi_sin2-wave_central | 0.863 Seconds | -- | -- |
| gwt_structured_sin2-wave_tvd | 1.207 Seconds | -- | -- |
| gwt_structured_square-wave_utvd | 2.190 Seconds | -- | -- |
| gwt_triangle_square-wave_utvd | 2.928 Seconds | -- | -- |
| gwt_structured_square-wave_central | 0.284 Seconds | -- | -- |
| gwt_triangle_step-wave_upstream | 0.436 Seconds | -- | -- |
| gwt_triangle_step-wave_tvd | 2.195 Seconds | -- | -- |
| gwt_structured_square-wave_upstream | 0.231 Seconds | -- | -- |
| gwt_structured_step-wave_central | 0.269 Seconds | -- | -- |
| gwt_structured_step-wave_utvd | 1.367 Seconds | -- | -- |
| gwt_structured_step-wave_upstream | 0.232 Seconds | -- | -- |
| gwt_voronoi_square-wave_central | 0.870 Seconds | -- | -- |
| gwt_voronoi_step-wave_utvd | 3.757 Seconds | -- | -- |
| gwt_voronoi_step-wave_central | 0.837 Seconds | -- | -- |
| gwt_voronoi_sin2-wave_utvd | 3.565 Seconds | -- | -- |
| gwt_triangle_step-wave_central | 0.503 Seconds | -- | -- |
| gwt_voronoi_square-wave_upstream | 0.865 Seconds | -- | -- |
| gwt_triangle_sin2-wave_central | 0.502 Seconds | -- | -- |
| gwt_structured_sin2-wave_utvd | 1.558 Seconds | -- | -- |
| gwt_triangle_square-wave_upstream | 0.454 Seconds | -- | -- |
| gwt_voronoi_step-wave_upstream | 0.861 Seconds | -- | -- |
| gwt_triangle_sin2-wave_utvd | 2.910 Seconds | -- | -- |
| gwt_triangle_square-wave_tvd | 2.016 Seconds | -- | -- |
| gwt_voronoi_sin2-wave_upstream | 0.857 Seconds | -- | -- |
| gwt_triangle_sin2-wave_tvd | 1.980 Seconds | -- | -- |
| ex-gwt-mt3dsupp631/mf6gwf | 0.008 Seconds | 0.009 Seconds | -11.11% |
| ex-gwt-mt3dsupp631/mf6gwt | 0.016 Seconds | -- | -- |
| ex-gwf-twri01 | 0.026 Seconds | 0.025 Seconds | 4.00% |
| ex-gwt-mt3dms-p04c | 6.649 Seconds | 6.613 Seconds | 0.54% |
| hb-005 | 0.454 Seconds | 0.451 Seconds | 0.67% |
| hb-020 | 0.452 Seconds | 0.451 Seconds | 0.22% |
| es-010 | 0.487 Seconds | 0.481 Seconds | 1.25% |
| es-001 | 0.484 Seconds | 0.482 Seconds | 0.41% |
| hb-050 | 0.453 Seconds | 0.454 Seconds | -0.22% |
| hb-100 | 0.453 Seconds | 0.452 Seconds | 0.22% |
| hb-001 | 0.456 Seconds | 0.449 Seconds | 1.56% |
| es-005 | 0.494 Seconds | 0.479 Seconds | 3.13% |
| es-050 | 0.486 Seconds | 0.481 Seconds | 1.04% |
| es-100 | 0.485 Seconds | 0.481 Seconds | 0.83% |
| hb-002 | 0.454 Seconds | 0.449 Seconds | 1.11% |
| es-020 | 0.485 Seconds | 0.489 Seconds | -0.82% |
| hb-010 | 0.454 Seconds | 0.456 Seconds | -0.44% |
| es-002 | 0.486 Seconds | 0.481 Seconds | 1.04% |
| ex-gwf-curvilin | 0.020 Seconds | 0.021 Seconds | -4.76% |
| ex-gwf-sagehen | 2 Minutes,  3.314 Seconds | 2 Minutes,  5.084 Seconds | -1.42% |
| ex-gwf-u1gwfgwf-s2 | 0.016 Seconds | 0.017 Seconds | -5.88% |
| ex-gwt-moc3d-p01a/mf6gwf | 0.008 Seconds | 0.008 Seconds | 0.00% |
| ex-gwt-moc3d-p01a/mf6gwt | 0.041 Seconds | -- | -- |
| ex-gwt-henry-b | 6.909 Seconds | 6.913 Seconds | -0.06% |
| ex-gwf-maw-p02 | 2.348 Seconds | 2.385 Seconds | -1.55% |
| ex-gwf-u1disv-x | 0.011 Seconds | 0.011 Seconds | 0.00% |
| ex-gwe-prt/gwf | 0.067 Seconds | 0.069 Seconds | -2.90% |
| ex-gwe-prt/gwe | 33.726 Seconds | -- | -- |
| ex-gwe-prt/prt | 0.033 Seconds | -- | -- |
| ex-gwf-curve-90 | 0.013 Seconds | 0.014 Seconds | -7.14% |
| ex-gwt-saltlake | 16.516 Seconds | 16.678 Seconds | -0.97% |
| ex-gwt-mt3dms-p01c | 0.039 Seconds | 0.039 Seconds | 0.00% |
| ex-gwf-whirl | 0.093 Seconds | 0.094 Seconds | -1.06% |
| ex-gwf-fhb | 0.011 Seconds | 0.012 Seconds | -8.33% |
| ex-gwt-mt3dms-p04b | 10.117 Seconds | 10.193 Seconds | -0.75% |
| ex-gwf-maw-p01a | 0.956 Seconds | 0.964 Seconds | -0.83% |
| ex-gwf-nwt-p03a | 0.220 Seconds | 0.221 Seconds | -0.45% |
| ex-gwt-uzt-2d-b | 9.295 Seconds | 9.226 Seconds | 0.75% |
| ex-gwt-mt3dms-p08 | 16.316 Seconds | 16.124 Seconds | 1.19% |
| ex-gwf-lak-p01 | 7.277 Seconds | 7.287 Seconds | -0.14% |
| ex-gwt-stallman | 8.905 Seconds | 8.810 Seconds | 1.08% |
| ex-gwt-mt3dsupp82/mf6gwf | 0.017 Seconds | 0.017 Seconds | 0.00% |
| ex-gwt-mt3dsupp82/mf6gwt | 0.145 Seconds | -- | -- |
| ex-gwf-lgrv-gr | 30.752 Seconds | 30.655 Seconds | 0.32% |
| ex-gwf-hanic | 0.018 Seconds | 0.019 Seconds | -5.26% |
| ex-gwt-mt3dms-p02e/mf6gwf | 0.260 Seconds | 0.260 Seconds | 0.00% |
| ex-gwt-mt3dms-p02e/mf6gwt | 0.377 Seconds | -- | -- |
| ex-gwt-mt3dms-p09 | 1.505 Seconds | 1.523 Seconds | -1.18% |
| ex-gwf-maw-p03b | 0.090 Seconds | 0.092 Seconds | -2.17% |
| ex-gwf-sfr-pindersauerb | 1.795 Seconds | 1.809 Seconds | -0.77% |
| ex-gwt-mt3dms-p10 | 54.242 Seconds | 53.259 Seconds | 1.85% |
| ex-gwf-toth | 0.144 Seconds | 0.144 Seconds | 0.00% |
| ex-gwf-advtidal | 0.549 Seconds | 0.536 Seconds | 2.43% |
| ex-gwe-barends/mf6gwf | 0.117 Seconds | 0.119 Seconds | -1.68% |
| ex-gwe-barends/mf6gwe | 4.799 Seconds | -- | -- |
| ex-gwt-moc3d-p01d/mf6gwf | 0.008 Seconds | 0.008 Seconds | 0.00% |
| ex-gwt-moc3d-p01d/mf6gwt | 0.038 Seconds | -- | -- |
| ex-gwt-mt3dms-p01b | 0.038 Seconds | 0.039 Seconds | -2.56% |
| ex-gwt-mt3dms-p02f/mf6gwf | 0.258 Seconds | 0.263 Seconds | -1.90% |
| ex-gwt-mt3dms-p02f/mf6gwt | 0.391 Seconds | -- | -- |
| ex-gwe-ates | 15.800 Seconds | 15.755 Seconds | 0.29% |
| Total simulation time | 12 Minutes, 17.284 Seconds | 12 Minutes, 20.508 Seconds | -0.44% |