Control link · Comparison

Query round trip

A program sent each box 3,000 queries one at a time, in two runs, timed on the PC's USB bus.

Query round trip, p50

Query	Stock	Medius	Result
Versionkm.version against QUERY(VERSION)	177-184 µs	219 µs	Stock
Statuskm.moving against QUERY(HEALTH)	176-177 µs	166 µs	Medius

Query round trip, p95

Query	Stock	Medius	Result
Versionkm.version against QUERY(VERSION)	240 µs	291-293 µs	Stock
Statuskm.moving against QUERY(HEALTH)	234-235 µs	230-239 µs	Equal

Paced moves, mouse still

One-count moves at a steady rate into a still mouse: stock's binary and text forms against Medius's MOVE frames, sent in 1 ms batches unless the table says otherwise. Each count adds 1 to the clone's X.

Counts arriving from 1 s of moves, binary

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
500/s	500/500	500/500	Equal
1,000/s	1,000/1,000	1,000/1,000	Equal
1,500/s	1,500/1,500	1,500/1,500	Equal
2,000/s	2,000/2,000	2,000/2,000	Equal
5,000/s	5,000/5,000	5,000/5,000	Equal

Counts arriving from 1 s of moves, text

Stock km.moveMedius MOVE

Moves/s	Stock`km.move`	Medius`MOVE`	Result
500/s	500/500	500/500	Equal
1,000/s	1,000/1,000	1,000/1,000	Equal
1,500/s	1,500/1,500	1,500/1,500	Equal
2,000/s	2,000/2,000	2,000/2,000	Equal
5,000/s	5,000/5,000	5,000/5,000	Equal

Counts arriving from 1 s of moves, one move per write

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
1,000/s	1,000/1,000	1,000/1,000	Equal
2,000/s	2,000/2,000	2,000/2,000	Equal
5,000/s	5,000/5,000	5,000/5,000	Equal

Counts arriving from 5 s of moves, binary

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
250/s	1,250/1,250	1,250/1,250	Equal
500/s	5,000/5,000	5,000/5,000	Equal
1,000/s	5,000/5,000	5,000/5,000	Equal
2,000/s	10,000/10,000	10,000/10,000	Equal

Counts arriving from 5 s of moves, text

Stock km.moveMedius MOVE

Moves/s	Stock`km.move`	Medius`MOVE`	Result
250/s	1,250/1,250	1,250/1,250	Equal
500/s	5,000/5,000	5,000/5,000	Equal
1,000/s	5,000/5,000	5,000/5,000	Equal
2,000/s	10,000/10,000	10,000/10,000	Equal

Paced moves, mouse moving

The same moves into a 1 kHz mouse whose Y moves 1-10 and back every 200 ms. Here stock refuses some moves, replying DE AD 01 00 18 FF to a binary move and ERR to a text one.

Counts arriving from 1 s of moves, binary

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
125/s	125/125	125/125	Equal
500/s	500/500	500/500	Equal
1,000/s	999/1,000	1,000/1,000	Medius
1,500/s	1,498/1,500	1,500/1,500	Medius
2,000/s	1,966/2,000	2,000/2,000	Medius
3,000/s	2,093/3,000	3,000/3,000	Medius
5,000/s	2,095/5,000	5,000/5,000	Medius

Counts arriving from 1 s of moves, text

Stock km.moveMedius MOVE

Moves/s	Stock`km.move`	Medius`MOVE`	Result
125/s	124/125	125/125	Medius
500/s	500/500	500/500	Equal
1,000/s	1,000/1,000	1,000/1,000	Equal
1,500/s	1,500/1,500	1,500/1,500	Equal
2,000/s	1,999/2,000	2,000/2,000	Medius
3,000/s	1,962/3,000	3,000/3,000	Medius
5,000/s	2,089/5,000	5,000/5,000	Medius

Counts arriving from 1 s of moves, one move per write

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
1,000/s	999/1,000	1,000/1,000	Medius
2,000/s	1,963/2,000	2,000/2,000	Medius
5,000/s	2,023/5,000	5,000/5,000	Medius

Counts arriving from 5 s of moves, binary

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
125/s	625/625	625/625	Equal
250/s	1,249/1,250	1,250/1,250	Medius
500/s	4,998/5,000	5,000/5,000	Medius
1,000/s	4,997/5,000	5,000/5,000	Medius

Counts arriving from 5 s of moves, text

Stock km.moveMedius MOVE

Moves/s	Stock`km.move`	Medius`MOVE`	Result
125/s	625/625	625/625	Equal
250/s	1,250/1,250	1,250/1,250	Equal
500/s	5,000/5,000	5,000/5,000	Equal
1,000/s	4,997/5,000	5,000/5,000	Medius

Move size

Moves of 10, 100 and 1,000 counts each, paced in 1 ms batches for 1 s into a still mouse.

Counts arriving from 1 s of 10-count moves, binary

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
500/s	5,000/5,000	5,000/5,000	Equal
1,000/s	10,000/10,000	10,000/10,000	Equal
1,500/s	15,000/15,000	15,000/15,000	Equal
2,000/s	20,000/20,000	20,000/20,000	Equal
5,000/s	50,000/50,000	50,000/50,000	Equal

Counts arriving from 1 s of 100-count moves, binary

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
500/s	50,000/50,000	50,000/50,000	Equal
1,000/s	100,000/100,000	100,000/100,000	Equal
1,500/s	150,000/150,000	150,000/150,000	Equal
2,000/s	200,000/200,000	200,000/200,000	Equal
5,000/s	500,000/500,000	500,000/500,000	Equal

Counts arriving from 1 s of 1,000-count moves, binary

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
500/s	500,000/500,000	500,000/500,000	Equal
1,000/s	1,000,000/1,000,000	1,000,000/1,000,000	Equal
1,500/s	1,500,000/1,500,000	1,500,000/1,500,000	Equal
2,000/s	2,000,000/2,000,000	2,000,000/2,000,000	Equal
5,000/s	5,000,000/5,000,000	5,000,000/5,000,000	Equal

Counts arriving from 1 s of 10-count moves, text

Stock km.moveMedius MOVE

Moves/s	Stock`km.move`	Medius`MOVE`	Result
500/s	5,000/5,000	5,000/5,000	Equal
1,000/s	10,000/10,000	10,000/10,000	Equal
1,500/s	15,000/15,000	15,000/15,000	Equal
2,000/s	20,000/20,000	20,000/20,000	Equal
5,000/s	50,000/50,000	50,000/50,000	Equal

Counts arriving from 1 s of 100-count moves, text

Stock km.moveMedius MOVE

Moves/s	Stock`km.move`	Medius`MOVE`	Result
500/s	50,000/50,000	50,000/50,000	Equal
1,000/s	100,000/100,000	100,000/100,000	Equal
1,500/s	150,000/150,000	150,000/150,000	Equal
2,000/s	200,000/200,000	200,000/200,000	Equal
5,000/s	500,000/500,000	500,000/500,000	Equal

Counts arriving from 1 s of 1,000-count moves, text

Stock km.moveMedius MOVE

Moves/s	Stock`km.move`	Medius`MOVE`	Result
500/s	500,000/500,000	500,000/500,000	Equal
1,000/s	1,000,000/1,000,000	1,000,000/1,000,000	Equal
1,500/s	1,500,000/1,500,000	1,500,000/1,500,000	Equal
2,000/s	2,000,000/2,000,000	2,000,000/2,000,000	Equal
5,000/s	5,000,000/5,000,000	5,000,000/5,000,000	Equal

Moves in one write

One write holding a clump of one-count moves, then 100 more paced 1 ms apart. Stock's binary moves are 9 bytes, its text moves 14, Medius's frames 12.

Counts arriving from one write of moves, binary

Stock MOVE (0x18)Medius MOVE

Moves in the write	Stock`MOVE (0x18)`	Medius`MOVE`	Result
8	8/8	8/8	Equal
16	16/16	16/16	Equal
20	20/20	20/20	Equal
24	24/24	24/24	Equal
28	56/56	56/56	Equal
29	58/58	58/58	Equal
30	29/60	60/60	Medius

Counts arriving from one write of moves, text

Stock km.moveMedius MOVE

Moves in the write	Stock`km.move`	Medius`MOVE`	Result
8	8/8	8/8	Equal
16	16/16	16/16	Equal

Parser after one write of 30 binary moves

Stock MOVE (0x18)Medius MOVE

Write	Stock`MOVE (0x18)`	Medius`MOVE`	Result
30 moves, 270 bytes for stock	One command behind until a power cycle	In step	MediusStock defect

Fast paced moves

One-count moves paced in 1 ms batches for 2 s into a still mouse: stock's binary form at each rate and its text form at 8,000/s, against Medius at the same rates. Stock was power-cycled after each run that left its parser one command behind.

Counts arriving from 2 s of fast moves

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
5,000	20,000/20,000	20,000/20,000	Equal
7,000	28,000/28,000	28,000/28,000	Equal
10,000	39,982/40,000	40,000/40,000	Medius
15,000	26,805/30,000	30,000/30,000	Medius
20,000	26,577/40,000	40,000/40,000	Medius

Counts arriving from 2 s of text moves at 8,000/s

Stock km.moveMedius MOVE

Runs	Stock`km.move`	Medius`MOVE`	Result
8,000/s	96,000/96,000	96,000/96,000	Equal

Clumped and back-to-back writes

One-count binary moves into a still mouse, written in clumps every 16 ms (as a sender whose timer wakes every 16 ms writes them), or 12,871 back to back in 4,096-byte writes. Stock was power-cycled after each run that left its parser one command behind.

Counts arriving from moves written in clumps every 16 ms

Stock MOVE (0x18)Medius MOVE

Moves/s	Stock`MOVE (0x18)`	Medius`MOVE`	Result
1,000/s, 16 per write	1,000/1,000	1,000/1,000	Equal
2,000/s, 32 per write	92/2,000	2,000/2,000	Medius

Counts arriving from 12,871 moves written back to back

Stock MOVE (0x18)Medius MOVE

Write	Stock`MOVE (0x18)`	Medius`MOVE`	Result
4,096-byte writes	138/12,871	12,871/12,871	Medius

Parser afterwards

Stock MOVE (0x18)Medius MOVE

Write	Stock`MOVE (0x18)`	Medius`MOVE`	Result
2,000/s, 32 per write	One command behind until a power cycle	In step	Medius
12,871 moves back to back	One command behind until a power cycle	In step	Medius

Malformed input

Malformed input sent to each box, then a valid move. One try each.

Valid move after the malformed input

Stock km.moveMedius MOVE(NOW)

Malformed input	Stock`km.move`	Medius`MOVE(NOW)`	Result
64 KB of random bytes	Arrives	Arrives	Equal
Half a move, the valid move 100 ms later	Lost	Arrives	Medius
Half a move, the valid move straight after	Lost	Lost	Equal
Move with a length field too long	Lost	Arrives	Medius
Unknown command	Arrives	Arrives	Equal
Move too short	Arrives	Arrives	Equal
5-count move with one bit flipped	Arrives	Arrives	Equal
Move written one byte a millisecond	Arrives	Arrives	Equal
100 moves, a zero byte after each	Arrives	Arrives	Equal

Counts moved by the malformed input

Malformed input	Stock	Result
64 KB of random bytes	0	Equal
Unknown command	0	Equal
Move too short	0	Equal
5-count move with one bit flipped	4	Medius

Replies to queries afterwards

Check	Stock	Medius	Result
After each malformed input	Correct	Correct	Equal