Use StringStream to build large strings
If building strings, use a StringStream value to accumulate the string and then convert
to a string.
Each string addition creates a new string.
FOR EXAMPLE:
|
a ="AAA"
b = a + a + a +a + a + a
--Creates 6 strings of length 3, 6, 9, 12, 15, 18
|
a ="AAA"
b = (a + a + a) + (a + a + a)
--Creates 6 strings of length 3, 6, 9, 6, 9, 18
|
TEST CASES:
|
fn test5a =
(
local a =""
for i = 1 to 100 do a += (i as string)
)
|
fn test5b =
(
local ss = stringstream""
for i = 1 to 100 do format "%"(i as string) to:ss
ss as string
)
|
fn test5c =
(
local ss = stringstream"",fmt ="%"
for i= 1 to 100 do format fmt (i as string) to:ss
ss as string
)
|
fn test5d =
(
local ss = stringstream"",fmt ="%"
for i = 1 to 100 do format fmt ito:ss
ss as string
)
|
FOR 100,000 ITERATIONS:
|
test5a() -- 58875 msec., 505 MB
test5b() -- 54672 msec., 39.2 MB
test5c() -- 41125 msec., 29.2 MB
test5d() -- 13532 msec., 10.0 MB
|
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