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By running our performance test suite multiple times, we can compare the effect
of different compilers: as might be expected, the differences are generally
small compared to say disabling internal use of long
double. However, there are still gains
to be main, particularly from some of the commercial offerings:
Table 21.5. Compiler Comparison on Windows x64
|
Function |
Microsoft Visual C++ version 14.0 |
GNU C++ version 5.3.0 |
GNU C++ version 5.3.0 |
Intel C++ C++0x mode version 1600 |
|---|---|---|---|---|
|
assoc_laguerre |
1.16 |
1.21 |
1.06 |
1.00 |
|
assoc_legendre |
1.57 |
1.80 |
1.16 |
1.00 |
|
beta |
1.74 |
3.78 |
2.17 |
1.00 |
|
beta (incomplete) |
1.44 |
3.03 |
1.84 |
1.00 |
|
cbrt |
3.21 |
3.43 |
3.07 |
1.00 |
|
cyl_bessel_i |
1.11 |
2.78 |
1.21 |
1.00 |
|
cyl_bessel_i (integer order) |
1.29 |
3.16 |
1.22 |
1.00 |
|
cyl_bessel_j |
1.19 |
2.06 |
1.25 |
1.00 |
|
cyl_bessel_j (integer order) |
1.36 |
2.39 |
1.47 |
1.00 |
|
cyl_bessel_k |
1.04 |
9.43 |
1.03 |
1.00 |
|
cyl_bessel_k (integer order) |
1.26 |
10.49 |
1.10 |
1.00 |
|
cyl_neumann |
16.76 |
2.01 |
1.00 |
15.35 |
|
cyl_neumann (integer order) |
1.00 |
1.79 |
1.24 |
1.02 |
|
digamma |
1.20 |
3.75 |
2.15 |
1.00 |
|
ellint_1 |
1.87 |
1.99 |
1.32 |
1.00 |
|
ellint_1 (complete) |
2.18 |
2.57 |
1.57 |
1.00 |
|
ellint_2 |
1.78 |
2.17 |
1.52 |
1.00 |
|
ellint_2 (complete) |
2.14 |
2.07 |
1.24 |
1.00 |
|
ellint_3 |
1.94 |
2.91 |
1.65 |
1.00 |
|
ellint_3 (complete) |
2.05 |
3.07 |
1.46 |
1.00 |
|
ellint_rc |
1.58 |
2.68 |
1.55 |
1.00 |
|
ellint_rd |
1.75 |
1.83 |
1.40 |
1.00 |
|
ellint_rf |
1.69 |
2.40 |
1.57 |
1.00 |
|
ellint_rj |
1.91 |
2.96 |
1.43 |
1.00 |
|
erf |
1.77 |
2.92 |
1.92 |
1.00 |
|
erfc |
1.29 |
3.41 |
2.06 |
1.00 |
|
expint |
1.39 |
3.07 |
2.14 |
1.00 |
|
expint (En) |
1.10 |
2.19 |
1.38 |
1.00 |
|
expm1 |
1.00 |
3.10 |
2.40 |
1.10 |
|
gamma_p |
1.29 |
2.64 |
1.71 |
1.00 |
|
gamma_p_inv |
1.36 |
2.47 |
1.91 |
1.00 |
|
gamma_q |
1.16 |
2.79 |
1.61 |
1.00 |
|
gamma_q_inv |
1.37 |
2.38 |
1.89 |
1.00 |
|
ibeta |
1.34 |
3.13 |
1.83 |
1.00 |
|
ibeta_inv |
1.51 |
2.81 |
2.27 |
1.00 |
|
ibetac |
1.29 |
2.94 |
1.73 |
1.00 |
|
ibetac_inv |
1.41 |
2.80 |
1.78 |
1.00 |
|
jacobi_cn |
1.36 |
3.72 |
2.28 |
1.00 |
|
jacobi_dn |
1.82 |
3.68 |
2.27 |
1.00 |
|
jacobi_sn |
1.31 |
3.73 |
2.43 |
1.00 |
|
laguerre |
1.00 |
1.15 |
1.04 |
1.10 |
|
legendre |
1.07 |
1.16 |
1.00 |
1.13 |
|
legendre Q |
1.00 |
1.20 |
1.01 |
1.07 |
|
lgamma |
1.00 |
3.07 |
1.82 |
1.05 |
|
log1p |
1.00 |
2.00 |
1.14 |
1.00 |
|
polygamma |
1.16 |
1.02 |
2.24 |
1.00 |
|
sph_bessel |
1.17 |
1.55 |
1.09 |
1.00 |
|
sph_neumann |
1.08 |
2.07 |
1.00 |
1.01 |
|
tgamma |
1.31 |
4.03 |
2.49 |
1.00 |
|
tgamma (incomplete) |
1.26 |
2.52 |
1.73 |
1.00 |
|
trigamma |
1.35 |
2.88 |
1.41 |
1.00 |
|
zeta |
1.34 |
3.83 |
2.52 |
1.00 |
Table 21.6. Compiler Comparison on linux
|
Function |
GNU C++ version 5.3.0 |
GNU C++ version 5.3.0 |
|---|---|---|
|
assoc_laguerre |
1.36 |
1.00 |
|
assoc_legendre |
2.55 |
1.00 |
|
beta |
4.71 |
1.00 |
|
beta (incomplete) |
3.12 |
1.00 |
|
cbrt |
2.53 |
1.00 |
|
cyl_bessel_i |
3.47 |
1.00 |
|
cyl_bessel_i (integer order) |
3.38 |
1.00 |
|
cyl_bessel_j |
2.69 |
1.00 |
|
cyl_bessel_j (integer order) |
2.59 |
1.00 |
|
cyl_bessel_k |
6.86 |
1.00 |
|
cyl_bessel_k (integer order) |
10.17 |
1.00 |
|
cyl_neumann |
2.48 |
1.00 |
|
cyl_neumann (integer order) |
2.20 |
1.00 |
|
digamma |
1.92 |
1.00 |
|
ellint_1 |
1.94 |
1.00 |
|
ellint_1 (complete) |
1.86 |
1.00 |
|
ellint_2 |
2.32 |
1.00 |
|
ellint_2 (complete) |
1.71 |
1.00 |
|
ellint_3 |
2.75 |
1.00 |
|
ellint_3 (complete) |
2.23 |
1.00 |
|
ellint_rc |
1.57 |
1.00 |
|
ellint_rd |
2.23 |
1.00 |
|
ellint_rf |
1.51 |
1.00 |
|
ellint_rj |
2.33 |
1.00 |
|
erf |
2.60 |
1.00 |
|
erfc |
2.68 |
1.00 |
|
expint |
2.47 |
1.00 |
|
expint (En) |
1.86 |
1.00 |
|
expm1 |
1.00 |
1.10 |
|
gamma_p |
2.42 |
1.00 |
|
gamma_p_inv |
2.24 |
1.00 |
|
gamma_q |
2.53 |
1.00 |
|
gamma_q_inv |
2.45 |
1.00 |
|
ibeta |
2.71 |
1.00 |
|
ibeta_inv |
2.58 |
1.00 |
|
ibetac |
2.66 |
1.00 |
|
ibetac_inv |
2.44 |
1.00 |
|
jacobi_cn |
2.77 |
1.00 |
|
jacobi_dn |
2.80 |
1.00 |
|
jacobi_sn |
2.86 |
1.00 |
|
laguerre |
1.09 |
1.00 |
|
legendre |
1.16 |
1.00 |
|
legendre Q |
1.18 |
1.00 |
|
lgamma |
2.20 |
1.00 |
|
log1p |
1.00 |
1.00 |
|
polygamma |
3.93 |
1.00 |
|
sph_bessel |
1.71 |
1.00 |
|
sph_neumann |
2.15 |
1.00 |
|
tgamma |
3.69 |
1.00 |
|
tgamma (incomplete) |
2.35 |
1.00 |
|
trigamma |
1.64 |
1.00 |
|
zeta |
2.71 |
1.00 |