[#SVC-1522] llBase64ToString() on MONO is 115 times slower than it's LSL1 counterpart.

2. Second Life Service - SVC

llBase64ToString() on MONO is 115 times slower than it's LSL1 counterpart.

Created: 12/Feb/08 04:00 AM Updated: 28/May/08 10:01 AM

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Issue 3466 of 4962 issue(s)

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Component/s:

Scripts

Affects Version/s:

Mono Beta

Fix Version/s:

None

Issue Links:

Relates

This issue is related to by:

~~SVC-1414~~ Mono: llBase64ToString does not work properly

~~SVC-1276~~ Mono issues

Linden Lab Issue ID:	DEV-15299
Linden Lab Internal Branch:	mono-based-on-1-20-0-server-84445

Description

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Run a simple loop with two identical scripts and check the time difference at the end.

integer GetGMTmsclock() {
string stamp = llGetTimestamp();
return
(integer) llGetSubString(stamp, 11, 12) * 3600000 +
(integer) llGetSubString(stamp, 14, 15) * 60000 +
llRound((float) llGetSubString(stamp, 17, -2) * 1000.0);
}

integer last;
integer now;
default {
state_entry() {
}

touch_start(integer total_number) {
now = GetGMTmsclock();
integer int;
for (int = 0; int < 100; int++) { string length = "SSBsaWtlIHRvIGVhdCBwaWVz"; string done = llBase64ToString(length); }
last = GetGMTmsclock();
llOwnerSay((string)(last - now) + " milliseconds.");
}
}

Same scripts results:
[3:56] LSL1: 289 milliseconds.
[3:57] MONO: 33471 milliseconds.

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Comments

Change History

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Lex Neva added a comment - 12/Feb/08 10:33 AM

I think llGetTime() is better suited to this kind of timing stuff... anyway, interesting find.

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Scouse Linden added a comment - 09/Apr/08 02:39 AM

Does LSL produce valid Unicode?
LSL can produce really fast garbage.

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NeoBokrug Elytis added a comment - 20/Apr/08 04:24 AM

Lex: You're right.

Scouse: I am uncertain, because I am not a Unicode expert, however 115 times slower is just unacceptable, especially since mono is supposed to be that much faster. It could mess up a lot of current content by being that much slower.

I'm gunna bump this up one level in priority since there aren't a lot of mono bugs, and I don't want this to get left on the back burner to be ignored when mono ihits the grid..

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Strife Onizuka added a comment - 25/Apr/08 06:13 AM

I think 115 is a bit drastic and I would write a faster implementation myself but at present the project hasn't interested me enough.

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Scouse Linden added a comment - 06/May/08 08:44 AM

Mono is now 5x faster than LSL2, with the caveats of the more restricted character range.

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Haravikk Mistral added a comment - 16/May/08 07:10 AM

What restricted character range? Why a restricted character range? More information please!

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Strife Onizuka added a comment - 16/May/08 08:14 PM

@Haravikk: ~~SVC-1960~~

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Periapse Linden added a comment - 28/May/08 10:01 AM

passed QA