php-types.txt

type            memory(bytes)
====            ======
empty object    62.91456
object (1 prop) 71.303168
object (2 props)        94.37184
object (3 props)        111.149056
object (4 props)        127.926272
object (4 str props)    289.406976
string (empty)  46.137344
string (1)      54.525952
string (2)      54.525952
string (8)      54.525952
string (9)      62.91456
int/long        16.777216
double/float    16.777216
SplFixedArray(0)        201.326592
SplFixedArray(1)        216.006656
SplFixedArray(2)        232.783872
SplFixedArray(3)        249.561088
SplFixedArray(4)        264.241152
SplFixedArray(5)        281.018368
SplFixedArray(6)        297.795584
SplFixedArray(7)        314.5728
SplFixedArray(8)        329.252864
SplFixedArray(9)        364.904448
SplFixedArray(10)       364.904448
SplFixedArray(11)       396.361728
SplFixedArray(12)       396.361728
SplFixedArray(13)       427.819008
SplFixedArray(14)       427.819008
SplFixedArray(15)       457.179136
SplFixedArray::fromArray(0)     176.160768
SplFixedArray::fromArray(1)     159.383552
SplFixedArray::fromArray(2)     176.160768
SplFixedArray::fromArray(3)     192.937984
SplFixedArray::fromArray(4)     207.618048
SplFixedArray::fromArray(5)     224.395264
SplFixedArray::fromArray(6)     241.17248
SplFixedArray::fromArray(7)     257.949696
SplFixedArray::fromArray(8)     272.62976
SplFixedArray::fromArray(9)     308.281344
SplFixedArray::fromArray(10)    308.281344
SplFixedArray::fromArray(11)    339.738624
SplFixedArray::fromArray(12)    339.738624
SplFixedArray::fromArray(13)    371.195904
SplFixedArray::fromArray(14)    371.195904
SplFixedArray::fromArray(15)    400.556032
array (empty)   71.303168
array 0 390.070272
array 1 390.070272
array 2 390.070272
array 3 390.070272
array 4 390.070272
array 5 390.070272
array 6 390.070272
array 7 390.070272
array 8 390.070272
array 9 710.934528
array 10        710.934528
array 11        710.934528
array 12        710.934528
array 13        710.934528
array 14        710.934528
array 15        710.934528
packed ints(1)  46.137344
packed ints(2)  54.525952
packed ints(3)  54.525952
packed ints(4)  62.91456