##########################################################################
benchmarking with 64 elements
#insert
indexmap took 7.446µs:
hashmap took 5.628µs:
std_vec took 781ns:
linked-hash-map took 5.418µs:

#iterate
indexmap took 78ns:
vec took 79ns:
hashmap took 222ns:
linked-hashmap took 79ns:
indexmap (values only) took 84ns:

#access
indexmap took 1.977µs:
vec took 2.679µs:
hashmap took 2.002µs:
linked-hashmap took 530ns:

#clone
indexmap took 3.229µs - 64
vec took 303ns - 64
hashmap took 2.713µs - 64
linked-hashmap took 5.235µs - 64

#push to back
indexmap took 11.16µs:
vec took 749ns:
hashmap unsupported
linked-hashmap took 443ns:

#remove (keep order)
indexmap took 11.001µs:
vec took 4.533µs:
can't preserve order in hashmap.
hashmap took 2.584µs:
linked-hashmap took 4.446µs:

##########################################################################
benchmarking with 512 elements
#insert
indexmap took 38.92µs:
hashmap took 36.4µs:
std_vec took 2.351µs:
linked-hash-map took 39.111µs:

#iterate
indexmap took 83ns:
vec took 75ns:
hashmap took 992ns:
linked-hashmap took 74ns:
indexmap (values only) took 79ns:

#access
indexmap took 9.573µs:
vec took 69.015µs:
hashmap took 9.322µs:
linked-hashmap took 1.939µs:

#clone
indexmap took 14.333µs - 512
vec took 2.696µs - 512
hashmap took 13.887µs - 512
linked-hashmap took 75.951µs - 512

#push to back
indexmap took 719.18µs:
vec took 21.715µs:
hashmap unsupported
linked-hashmap took 2.983µs:

#remove (keep order)
indexmap took 372.639µs:
vec took 15.449µs:
can't preserve order in hashmap.
hashmap took 13.191µs:
linked-hashmap took 12.977µs:

##########################################################################
benchmarking with 100000 elements
#insert
indexmap took 5.121151ms:
hashmap took 6.516268ms:
std_vec took 144.792µs:
linked-hash-map took 8.548027ms:

#iterate
indexmap took 47ns:
vec took 38ns:
hashmap took 105.573µs:
linked-hashmap took 41ns:
indexmap (values only) took 40ns:

#access
indexmap took 2.543214ms:
vec took 2.447872487s:
hashmap took 2.793451ms:
linked-hashmap took 1.026799ms:

#clone
indexmap took 1.967149ms - 100000
vec took 453.961µs - 100000
hashmap took 1.173746ms - 100000
linked-hashmap took 8.726053ms - 100000

#push to back
indexmap took 20.420952628s:
vec took 1.784034195s:
hashmap unsupported
linked-hashmap took 1.481067ms:

#remove (keep order)
indexmap took 17.82113988s:
vec took 828.959382ms:
can't preserve order in hashmap.
hashmap took 3.428035ms:
linked-hashmap took 2.025402ms: