The purpose of these measurements is to highlight possible improvements of GMP's low-level functions. The comparisons might include C fallbacks; in such cases the result indicates the need for asm implementation.

This is a new page, and it will therefore have glitches:

1. Results for notoriously inaccurate machines should either be suppressed or else be given greater tolerance (e.g. pentium4, bulldozers).
2. The tolerance ranges might be too narrow in some cases.

system/abi	under-performing function	factor (expected lower)	comparison function
bd2/64:	add_n	1.07	sub_n
parks/32:	add_n	1.1	sub_n
bt1/64:	addlsh1_n	1.15	rsblsh1_n
raph/64:	addlsh2_n	1.12	addlsh_n
verm/64:	addlsh2_n	1.14	addlsh_n
piri/64:	addlsh2_n	1.27	addlsh_n
suri/64:	addlsh2_n	1.27	addlsh_n
mati/64:	addlsh2_n	1.34	addlsh_n
bwl/64:	addlsh_n	1.06	addmul_1.3
roc/64:	addlsh_n	1.07	addmul_1.3
sky/64:	addlsh_n	1.07	addmul_1.3
k10/64:	addlsh_n	1.11	addmul_1.3
bt2/64:	addlsh_n	1.14	addmul_1.3
ald/64:	addlsh_n	1.18	addmul_1.3
k8/64:	addlsh_n	1.18	addmul_1.3
bt1/64:	addlsh_n	1.53	addlsh1_n
gege/64:	addlsh_n	1.53	addlsh1_n
bd2/64:	addlsh_n	1.61	addlsh1_n
bt2/64:	addlsh_n	1.71	addlsh2_n
bd1/64:	addlsh_n	1.73	addlsh1_n
slm/64:	addlsh_n	1.75	addlsh1_n
slm/64:	addlsh_n	1.75	addlsh2_n
bt2/64:	addlsh_n	1.83	addlsh1_n
element/64:	addlsh_n	2.35	addlsh1_n
element/64:	addlsh_n	2.35	addlsh2_n
beagle/32:	addmul_1.3	0.84	addmul_2
hwl/64:	addmul_1.3	1.37	mul_1.3
gcc1-power7/mode64:	addmul_1.3	1.38	mul_1.3
glmgentoo32/32:	addmul_1.3	1.4	mul_1.3
plm/32:	addmul_1.3	1.40	mul_1.3
odc4/32:	addmul_1.3	1.43	mul_1.3
spigg/32:	addmul_1.3	1.51	mul_1.3
trm/32:	addmul_1.3	1.75	mul_1.3
bt1/64:	addmul_2	2.06	addmul_1.3
bt2/64:	addmul_2	2.16	addmul_1.3
sky/64:	addmul_2	2.45	addmul_1.3
bwl/64:	addmul_2	2.47	addmul_1.3
ald/64:	addmul_2	2.55	addmul_1.3
roc/64:	addmul_2	2.58	addmul_1.3
piri/64:	copyd	1.17	copyi
odxu4/32:	copyd	1.19	copyi
suri/64:	copyd	1.20	copyi
bt1/32:	copyd	1.45	copyi
bt2/32:	copyi	1.06	copyd
g5/mode32:	copyi	1.06	copyd
roc/32:	copyi	1.06	copyd
ald/32:	copyi	1.07	copyd
roc/64:	copyi	1.07	copyd
odc4/32:	copyi	1.14	copyd
bt1/32:	mul_1.3	1.06	addmul_1.3
nanom4/32:	mul_1.3	1.06	addmul_1.3
slm/32:	mul_1.3	1.07	addmul_1.3
nanom4/64:	mul_basecase	2.02	mullo_basecase
element/64:	mul_basecase	2.21	mullo_basecase
trm/32:	mullo_basecase	0.63	mul_basecase
k8/64:	mullo_basecase	0.64	mul_basecase
gcc2-power8/mode64:	mullo_basecase	0.71	mul_basecase
bt1/64:	mullo_basecase	0.72	mul_basecase
gcc1-power7/mode64:	mullo_basecase	0.73	mul_basecase
ald/32:	mullo_basecase	0.75	mul_basecase
g5/mode64:	mullo_basecase	0.75	mul_basecase
verm/32:	mullo_basecase	0.76	mul_basecase
gege/32:	mullo_basecase	0.77	mul_basecase
raph/32:	mullo_basecase	0.77	mul_basecase
slm/32:	mullo_basecase	0.81	mul_basecase
glmgentoo32/32:	mullo_basecase	0.82	mul_basecase
piri/32:	mullo_basecase	0.83	mul_basecase
roc/32:	mullo_basecase	0.83	mul_basecase
suri/32:	mullo_basecase	0.83	mul_basecase
odxu4/32:	mullo_basecase	0.84	mul_basecase
bt2/32:	mullo_basecase	0.85	mul_basecase
mati/32:	mullo_basecase	0.85	mul_basecase
odc4/32:	mullo_basecase	0.85	mul_basecase
bd2/32:	mullo_basecase	0.86	mul_basecase
k10/32:	mullo_basecase	0.86	mul_basecase
lgentoo4.s390.gentoo.wh0rd.org/64:	mullo_basecase	0.86	mul_basecase
nanom4/32:	mullo_basecase	0.86	mul_basecase
pnr/32:	mullo_basecase	0.86	mul_basecase
bd1/32:	mullo_basecase	0.87	mul_basecase
nanom4/32:	mullo_basecase	0.87	mul_basecase
cnr/32:	mullo_basecase	0.88	mul_basecase
nhm/32:	mullo_basecase	0.88	mul_basecase
bd4/32:	mullo_basecase	0.89	mul_basecase
bt1/32:	mullo_basecase	0.89	mul_basecase
element/32:	mullo_basecase	0.92	mul_basecase
odc1/32:	mullo_basecase	0.93	mul_basecase
plm/32:	mullo_basecase	0.93	mul_basecase
sky/32:	mullo_basecase	0.94	mul_basecase
tinker/32:	mullo_basecase	0.94	mul_basecase
wsm/32:	mullo_basecase	0.94	mul_basecase
k8/32:	mullo_basecase	0.95	mul_basecase
parks/32:	mullo_basecase	0.97	mul_basecase
cfarm135/mode64:	mullo_basecase	1.01	mul_basecase
beagle/32:	mullo_basecase	1.02	mul_basecase
odn2/32:	mullo_basecase	1.02	mul_basecase
ivygentoo32/32:	mullo_basecase	1.07	mul_basecase
sbr/32:	mullo_basecase	1.10	mul_basecase
bwl/32:	mullo_basecase	1.11	mul_basecase
hwl/32:	mullo_basecase	1.15	mul_basecase
g5/32:	redc_1	1.25	mul_basecase
nhm/64:	redc_1	1.26	mul_basecase
wsm/64:	redc_1	1.26	mul_basecase
verm/64:	redc_1	1.35	mul_basecase
g5/mode64:	redc_1	1.37	mul_basecase
raph/64:	redc_1	1.37	mul_basecase
slm/32:	redc_1	1.37	mul_basecase
cnr/64:	redc_1	1.39	mul_basecase
pnr/64:	redc_1	1.40	mul_basecase
gege/32:	redc_1	1.42	mul_basecase
verm/32:	redc_1	1.43	mul_basecase
raph/32:	redc_1	1.44	mul_basecase
trm/32:	redc_1	1.44	mul_basecase
k10/32:	redc_1	1.46	mul_basecase
glmgentoo32/32:	redc_1	1.5	mul_basecase
piri/64:	redc_1	1.51	mul_basecase
suri/64:	redc_1	1.51	mul_basecase
k8/32:	redc_1	1.54	mul_basecase
mati/64:	redc_1	1.55	mul_basecase
bt1/32:	redc_1	1.56	mul_basecase
mati/32:	redc_1	1.60	mul_basecase
ald/32:	redc_1	1.62	mul_basecase
bd1/32:	redc_1	1.63	mul_basecase
piri/32:	redc_1	1.63	mul_basecase
bd4/32:	redc_1	1.64	mul_basecase
suri/32:	redc_1	1.64	mul_basecase
bd2/32:	redc_1	1.65	mul_basecase
plm/32:	redc_1	1.65	mul_basecase
bt2/32:	redc_1	1.67	mul_basecase
nhm/32:	redc_1	1.67	mul_basecase
cnr/32:	redc_1	1.68	mul_basecase
pnr/32:	redc_1	1.68	mul_basecase
roc/32:	redc_1	1.70	mul_basecase
odc1/32:	redc_1	1.76	mul_basecase
tinker/32:	redc_1	1.76	mul_basecase
odc4/32:	redc_1	1.79	mul_basecase
element/32:	redc_1	1.82	mul_basecase
wsm/32:	redc_1	1.82	mul_basecase
cfarm135/mode64:	redc_1	1.87	mul_basecase
odn2/32:	redc_1	1.87	mul_basecase
beagle/32:	redc_1	1.92	mul_basecase
sky/32:	redc_1	1.99	mul_basecase
ivygentoo32/32:	redc_1	2.02	mul_basecase
bwl/32:	redc_1	2.09	mul_basecase
parks/32:	redc_1	2.1	mul_basecase
sbr/32:	redc_1	2.10	mul_basecase
hwl/32:	redc_1	2.16	mul_basecase
element/64:	rsblsh1_n	2.12	addlsh1_n
raph/64:	rsblsh2_n	1.08	rsblsh_n
verm/64:	rsblsh2_n	1.15	rsblsh_n
piri/64:	rsblsh2_n	1.26	rsblsh_n
suri/64:	rsblsh2_n	1.26	rsblsh_n
mati/64:	rsblsh2_n	1.32	rsblsh_n
element/64:	rsblsh2_n	2.00	addlsh2_n
bt1/64:	rsblsh_n	1.14	addlsh_n
gege/64:	rsblsh_n	1.53	rsblsh1_n
bd2/64:	rsblsh_n	1.63	rsblsh1_n
bt2/64:	rsblsh_n	1.72	rsblsh2_n
bd1/64:	rsblsh_n	1.73	rsblsh1_n
slm/64:	rsblsh_n	1.75	rsblsh1_n
slm/64:	rsblsh_n	1.75	rsblsh2_n
bt2/64:	rsblsh_n	1.83	rsblsh1_n
bt1/64:	rsblsh_n	2.00	rsblsh1_n
raph/64:	rsh1add_n	1.16	addlsh1_n
trm/64:	rsh1add_n	1.16	addlsh1_n
verm/64:	rsh1add_n	1.20	addlsh1_n
glmgentoo64/64:	rsh1add_n	1.33	addlsh1_n
slm/64:	rsh1add_n	1.33	addlsh1_n
tinker/32:	rsh1add_n	1.33	addlsh1_n
beagle/32:	rsh1add_n	1.35	addlsh1_n
raph/64:	rsh1sub_n	1.16	addlsh1_n
trm/64:	rsh1sub_n	1.18	addlsh1_n
bt1/64:	rsh1sub_n	1.18	rsh1add_n
verm/64:	rsh1sub_n	1.19	addlsh1_n
tinker/32:	rsh1sub_n	1.32	addlsh1_n
glmgentoo64/64:	rsh1sub_n	1.33	addlsh1_n
slm/64:	rsh1sub_n	1.34	addlsh1_n
beagle/32:	rsh1sub_n	1.36	addlsh1_n
mati/64:	sbpi1_bdiv_r	1.27	mul_basecase
g5/32:	sbpi1_bdiv_r	1.32	mul_basecase
slm/32:	sbpi1_bdiv_r	1.34	mul_basecase
gege/32:	sbpi1_bdiv_r	1.39	mul_basecase
trm/32:	sbpi1_bdiv_r	1.39	mul_basecase
verm/32:	sbpi1_bdiv_r	1.39	mul_basecase
nhm/64:	sbpi1_bdiv_r	1.40	mul_basecase
g5/mode64:	sbpi1_bdiv_r	1.41	mul_basecase
wsm/64:	sbpi1_bdiv_r	1.41	mul_basecase
k10/32:	sbpi1_bdiv_r	1.42	mul_basecase
raph/32:	sbpi1_bdiv_r	1.42	mul_basecase
glmgentoo32/32:	sbpi1_bdiv_r	1.5	mul_basecase
bt1/32:	sbpi1_bdiv_r	1.53	mul_basecase
cnr/64:	sbpi1_bdiv_r	1.53	mul_basecase
k8/32:	sbpi1_bdiv_r	1.53	mul_basecase
mati/32:	sbpi1_bdiv_r	1.53	mul_basecase
bd4/32:	sbpi1_bdiv_r	1.54	mul_basecase
nhm/32:	sbpi1_bdiv_r	1.54	mul_basecase
pnr/64:	sbpi1_bdiv_r	1.54	mul_basecase
ald/32:	sbpi1_bdiv_r	1.57	mul_basecase
pnr/32:	sbpi1_bdiv_r	1.57	mul_basecase
bd1/32:	sbpi1_bdiv_r	1.58	mul_basecase
cnr/32:	sbpi1_bdiv_r	1.58	mul_basecase
bd2/32:	sbpi1_bdiv_r	1.59	mul_basecase
bt2/32:	sbpi1_bdiv_r	1.59	mul_basecase
piri/32:	sbpi1_bdiv_r	1.59	mul_basecase
suri/32:	sbpi1_bdiv_r	1.59	mul_basecase
roc/32:	sbpi1_bdiv_r	1.64	mul_basecase
plm/32:	sbpi1_bdiv_r	1.68	mul_basecase
element/32:	sbpi1_bdiv_r	1.70	mul_basecase
wsm/32:	sbpi1_bdiv_r	1.70	mul_basecase
odc4/32:	sbpi1_bdiv_r	1.74	mul_basecase
tinker/32:	sbpi1_bdiv_r	1.82	mul_basecase
cfarm135/mode64:	sbpi1_bdiv_r	1.88	mul_basecase
sky/32:	sbpi1_bdiv_r	1.88	mul_basecase
beagle/32:	sbpi1_bdiv_r	1.92	mul_basecase
odn2/32:	sbpi1_bdiv_r	1.92	mul_basecase
ivygentoo32/32:	sbpi1_bdiv_r	1.97	mul_basecase
sbr/32:	sbpi1_bdiv_r	1.97	mul_basecase
bwl/32:	sbpi1_bdiv_r	1.98	mul_basecase
parks/32:	sbpi1_bdiv_r	2	mul_basecase
hwl/32:	sbpi1_bdiv_r	2.03	mul_basecase
bd1/32:	sqr_basecase	0.65	mul_basecase
slm/32:	sqr_basecase	0.65	mul_basecase
cfarm135/mode64:	sqr_basecase	0.66	mul_basecase
gcc1-power7/mode64:	sqr_basecase	0.66	mul_basecase
gege/32:	sqr_basecase	0.66	mul_basecase
glmgentoo64/64:	sqr_basecase	0.66	mul_basecase
k10/64:	sqr_basecase	0.66	mul_basecase
k8/64:	sqr_basecase	0.66	mul_basecase
nanom4/32:	sqr_basecase	0.66	mul_basecase
odc1/32:	sqr_basecase	0.66	mul_basecase
tinker/32:	sqr_basecase	0.66	mul_basecase
bwl/32:	sqr_basecase	0.67	mul_basecase
ivygentoo32/32:	sqr_basecase	0.67	mul_basecase
nhm/32:	sqr_basecase	0.67	mul_basecase
odc4/32:	sqr_basecase	0.67	mul_basecase
ald/32:	sqr_basecase	0.68	mul_basecase
bd4/32:	sqr_basecase	0.68	mul_basecase
beagle/32:	sqr_basecase	0.68	mul_basecase
g5/mode32:	sqr_basecase	0.68	mul_basecase
glmgentoo32/32:	sqr_basecase	0.68	mul_basecase
hwl/32:	sqr_basecase	0.68	mul_basecase
roc/32:	sqr_basecase	0.68	mul_basecase
bt1/64:	sqr_basecase	0.69	mul_basecase
odn2/32:	sqr_basecase	0.69	mul_basecase
plm/32:	sqr_basecase	0.69	mul_basecase
plm/64:	sqr_basecase	0.69	mul_basecase
sky/32:	sqr_basecase	0.69	mul_basecase
cnr/32:	sqr_basecase	0.70	mul_basecase
g5/32:	sqr_basecase	0.70	mul_basecase
pnr/32:	sqr_basecase	0.70	mul_basecase
sbr/32:	sqr_basecase	0.70	mul_basecase
wsm/32:	sqr_basecase	0.70	mul_basecase
bt1/32:	sqr_basecase	0.71	mul_basecase
element/32:	sqr_basecase	0.72	mul_basecase
piri/32:	sqr_basecase	0.73	mul_basecase
suri/32:	sqr_basecase	0.73	mul_basecase
trm/32:	sqr_basecase	0.73	mul_basecase
lgentoo4.s390.gentoo.wh0rd.org/64:	sqr_basecase	0.74	mul_basecase
parks/32:	sqr_basecase	0.74	mul_basecase
k8/32:	sqr_basecase	0.76	mul_basecase
gcc2-power8/mode64:	sqr_basecase	0.77	mul_basecase
gege/64:	sqr_basecase	0.83	mul_basecase
bt1/64:	sub_n	1.24	add_n
element/32:	submul_1.3	1.27	addmul_1.3
pnr/32:	submul_1.3	1.31	addmul_1.3
cnr/32:	submul_1.3	1.32	addmul_1.3
raph/64:	submul_1.3	1.34	addmul_1.3
verm/64:	submul_1.3	1.35	addmul_1.3