When 'maximizing' a Minecraft window, my framerate drops to a consistent 15 fps when I'm otherwise able to run at around 60fps in most other situations.
Steps to Reproduce:
1. Start Minecraft
– Edit: Set Render Distance to 'Normal'. –
2. Hit f3 to bring up the stats display
3. measure fps.
4. 'Stretch' the window so that it's almost maximized, but not quite. Measure fps.
5. 'Maximize' the window via the windows maximize button or double-clicking the title bar. Measure fps. Note the massive drop.
In the screenshots below, I've posted examples of what this looks like. In the first, 2013-09-06_15.44.56.png, it's the little bitty window that Minecraft always starts with. 58 fps. This is on the new 'amplified' world setting, just after I've created a new world, so it's working pretty hard.
In the next, 2013-09-06_15.46.01.png, I've stretched it out so that it's not quite maximized. 60fps
In the third, 2013-09-06_15.46.19.png, I've 'stretched' the display across two monitors. 59 fps.
In the last, 2013-09-06_15.46.34.png, I've moved the display back onto the main monitor (powered by the GT430) and simply maximized it so it's slightly larger than the 2nd. Drop to 15fps.
So something about 'maximizing' the window is arbitrarily limiting the FPS there, especially if I can drag it across multiple displays for a larger total pixel count.
Attachments
Comments


Cannot confirm.
---- Minecraft Crash Report ----
// You're mean.
Time: 9/6/13 9:28 PM
Description: Manually triggered debug crash
java.lang.Throwable
at awb.m(SourceFile:1282)
at awb.V(SourceFile:686)
at awb.e(SourceFile:642)
at net.minecraft.client.main.Main.main(SourceFile:103)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at bfi.a(SourceFile:285)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [bfn['mahamatan'/191, l='MpServer', x=-72.78, y=65.62, z=-242.27]]
Chunk stats: MultiplayerChunkCache: 270, 270
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-132,64,276), Chunk: (at 12,4,4 in -9,17; contains blocks -144,0,272 to -129,255,287), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 185906 game time, 230591 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 127 total; [sf['Chicken'/274, l='MpServer', x=-138.47, y=66.00, z=-181.53], sf['Chicken'/272, l='MpServer', x=-129.56, y=68.00, z=-209.44], sf['Chicken'/283, l='MpServer', x=-122.56, y=78.00, z=-283.47], sf['Chicken'/282, l='MpServer', x=-125.06, y=72.00, z=-284.25], tj['item.item.egg'/281, l='MpServer', x=-120.75, y=69.13, z=-296.25], un['Zombie'/830, l='MpServer', x=-36.53, y=14.00, z=-198.84], sf['Chicken'/280, l='MpServer', x=-120.53, y=72.00, z=-299.38], tj['item.item.egg'/287, l='MpServer', x=-122.97, y=72.13, z=-284.03], tj['item.item.egg'/286, l='MpServer', x=-117.13, y=75.13, z=-274.44], tj['item.item.egg'/285, l='MpServer', x=-120.19, y=75.13, z=-272.88], sf['Chicken'/284, l='MpServer', x=-117.44, y=75.00, z=-276.34], sf['Chicken'/256, l='MpServer', x=-128.53, y=71.00, z=-271.63], sd['Bat'/263, l='MpServer', x=-128.47, y=56.13, z=-261.38], tw['Creeper'/260, l='MpServer', x=-136.69, y=15.00, z=-266.06], sd['Bat'/1888, l='MpServer', x=-144.44, y=49.10, z=-218.44], sd['Bat'/266, l='MpServer', x=-128.27, y=57.32, z=-258.05], sd['Bat'/1890, l='MpServer', x=-2.75, y=63.10, z=-231.75], tw['Creeper'/270, l='MpServer', x=-143.50, y=52.00, z=-234.50], so['Sheep'/268, l='MpServer', x=-128.53, y=70.00, z=-268.66], uj['Slime'/269, l='MpServer', x=-134.63, y=22.00, z=-250.69], sd['Bat'/1887, l='MpServer', x=-110.25, y=43.83, z=-234.25], sf['Chicken'/308, l='MpServer', x=-103.41, y=68.00, z=-292.38], sd['Bat'/2714, l='MpServer', x=-39.78, y=21.00, z=-253.25], sf['Chicken'/311, l='MpServer', x=-103.47, y=67.00, z=-238.69], uj['Slime'/2237, l='MpServer', x=-30.53, y=62.00, z=-319.19], sf['Chicken'/313, l='MpServer', x=-97.47, y=67.00, z=-243.38], sf['Chicken'/312, l='MpServer', x=-95.09, y=67.00, z=-238.94], tj['item.item.egg'/315, l='MpServer', x=-103.13, y=67.13, z=-239.56], un['Zombie'/314, l='MpServer', x=-93.93, y=53.00, z=-237.61], sf['Chicken'/317, l='MpServer', x=-94.68, y=67.00, z=-233.56], tj['item.item.egg'/316, l='MpServer', x=-102.81, y=67.13, z=-235.00], sf['Chicken'/319, l='MpServer', x=-94.05, y=67.00, z=-233.15], tj['item.item.egg'/318, l='MpServer', x=-98.69, y=67.13, z=-239.47], sf['Chicken'/288, l='MpServer', x=-119.69, y=75.00, z=-270.88], sf['Chicken'/289, l='MpServer', x=-126.47, y=69.00, z=-266.44], sf['Chicken'/290, l='MpServer', x=-113.56, y=75.00, z=-266.44], tj['item.item.egg'/291, l='MpServer', x=-126.50, y=69.13, z=-264.47], tw['Creeper'/292, l='MpServer', x=-118.50, y=71.00, z=-258.50], so['Sheep'/295, l='MpServer', x=-112.03, y=66.00, z=-223.16], uj['Slime'/296, l='MpServer', x=-122.78, y=13.00, z=-216.78], tw['Creeper'/297, l='MpServer', x=-115.31, y=54.00, z=-209.50], so['Sheep'/299, l='MpServer', x=-116.28, y=66.00, z=-223.81], sf['Chicken'/301, l='MpServer', x=-120.75, y=62.46, z=-179.25], sf['Chicken'/302, l='MpServer', x=-123.44, y=62.43, z=-178.56], tj['item.item.egg'/343, l='MpServer', x=-94.41, y=67.13, z=-241.69], ui['Skeleton'/2270, l='MpServer', x=-150.41, y=66.00, z=-246.72], un['Zombie'/340, l='MpServer', x=-83.78, y=18.00, z=-306.47], un['Zombie'/351, l='MpServer', x=-98.03, y=53.00, z=-236.50], un['Zombie'/350, l='MpServer', x=-95.69, y=53.00, z=-236.31], sf['Chicken'/349, l='MpServer', x=-103.72, y=67.00, z=-237.63], sf['Chicken'/348, l='MpServer', x=-97.41, y=67.00, z=-237.41], sf['Chicken'/347, l='MpServer', x=-99.53, y=67.00, z=-241.53], tj['item.item.egg'/346, l='MpServer', x=-95.50, y=67.13, z=-241.31], sf['Chicken'/345, l='MpServer', x=-93.53, y=67.00, z=-241.57], sf['Chicken'/344, l='MpServer', x=-98.45, y=67.00, z=-233.38], sf['Chicken'/326, l='MpServer', x=-99.44, y=67.00, z=-235.06], so['Sheep'/327, l='MpServer', x=-110.75, y=66.00, z=-227.13], sf['Chicken'/324, l='MpServer', x=-94.60, y=67.00, z=-240.42], sf['Chicken'/325, l='MpServer', x=-94.88, y=67.00, z=-234.84], sf['Chicken'/322, l='MpServer', x=-97.69, y=67.00, z=-238.75], sf['Chicken'/323, l='MpServer', x=-98.56, y=67.00, z=-243.66], sf['Chicken'/320, l='MpServer', x=-101.06, y=67.00, z=-233.59], sf['Chicken'/321, l='MpServer', x=-101.38, y=67.00, z=-239.53], sf['Chicken'/334, l='MpServer', x=-105.47, y=73.00, z=-171.44], ui['Skeleton'/332, l='MpServer', x=-109.50, y=32.00, z=-185.50], so['Sheep'/330, l='MpServer', x=-111.97, y=66.00, z=-226.34], ui['Skeleton'/331, l='MpServer', x=-96.50, y=15.00, z=-185.50], so['Sheep'/328, l='MpServer', x=-106.72, y=66.00, z=-210.50], so['Sheep'/329, l='MpServer', x=-104.16, y=66.00, z=-209.63], un['Zombie'/372, l='MpServer', x=-86.50, y=21.00, z=-171.50], uk['Spider'/369, l='MpServer', x=-87.22, y=18.88, z=-191.72], sd['Bat'/370, l='MpServer', x=-93.75, y=54.10, z=-183.63], ui['Skeleton'/2289, l='MpServer', x=-23.50, y=63.00, z=-257.50], ui['Skeleton'/2287, l='MpServer', x=-22.50, y=63.00, z=-258.50], tj['item.item.egg'/356, l='MpServer', x=-93.69, y=67.13, z=-233.13], sf['Chicken'/357, l='MpServer', x=-93.56, y=67.00, z=-233.75], uk['Spider'/2285, l='MpServer', x=-21.38, y=63.00, z=-264.16], sf['Chicken'/358, l='MpServer', x=-93.15, y=67.00, z=-233.15], sf['Chicken'/359, l='MpServer', x=-103.84, y=67.00, z=-243.22], un['Zombie'/352, l='MpServer', x=-97.97, y=53.00, z=-237.69], tw['Creeper'/2282, l='MpServer', x=-3.28, y=64.00, z=-275.88], sf['Chicken'/354, l='MpServer', x=-99.18, y=67.00, z=-233.96], sf['Chicken'/355, l='MpServer', x=-93.59, y=67.00, z=-243.53], ui['Skeleton'/2279, l='MpServer', x=-1.50, y=64.00, z=-280.50], uk['Spider'/364, l='MpServer', x=-85.28, y=13.00, z=-207.75], sd['Bat'/365, l='MpServer', x=-92.25, y=55.10, z=-198.63], tw['Creeper'/2277, l='MpServer', x=-4.13, y=64.00, z=-276.47], un['Zombie'/2276, l='MpServer', x=-22.66, y=62.01, z=-207.56], sd['Bat'/367, l='MpServer', x=-94.08, y=52.83, z=-186.41], tw['Creeper'/2275, l='MpServer', x=-89.50, y=17.00, z=-196.50], sf['Chicken'/360, l='MpServer', x=-97.80, y=67.00, z=-234.10], tx['Enderman'/2274, l='MpServer', x=-91.94, y=17.00, z=-201.22], sf['Chicken'/361, l='MpServer', x=-98.91, y=67.00, z=-233.22], sf['Chicken'/362, l='MpServer', x=-98.13, y=67.00, z=-240.47], tx['Enderman'/2272, l='MpServer', x=-91.75, y=17.00, z=-198.69], sf['Chicken'/363, l='MpServer', x=-95.63, y=67.00, z=-240.81], tj['item.item.egg'/410, l='MpServer', x=-40.66, y=61.13, z=-208.72], sf['Chicken'/411, l='MpServer', x=-41.06, y=74.00, z=-164.75], sg['Cow'/408, l='MpServer', x=-37.75, y=63.00, z=-278.22], sf['Chicken'/409, l='MpServer', x=-37.63, y=63.00, z=-209.56], sf['Chicken'/413, l='MpServer', x=-39.81, y=74.00, z=-164.78], tw['Creeper'/3157, l='MpServer', x=-69.50, y=49.00, z=-164.50], tw['Creeper'/3156, l='MpServer', x=-69.50, y=49.00, z=-165.50], sr['Squid'/403, l='MpServer', x=-56.13, y=61.09, z=-201.47], ui['Skeleton'/407, l='MpServer', x=-37.50, y=40.00, z=-298.50], uj['Slime'/404, l='MpServer', x=-50.31, y=34.00, z=-181.69], uj['Slime'/405, l='MpServer', x=-49.31, y=32.89, z=-180.69], un['Zombie'/386, l='MpServer', x=-80.03, y=22.00, z=-176.53], uj['Slime'/385, l='MpServer', x=-68.22, y=63.00, z=-223.78], uj['Slime'/384, l='MpServer', x=-71.69, y=13.77, z=-282.94], sf['Chicken'/433, l='MpServer', x=-24.47, y=62.40, z=-176.84], uk['Spider'/2009, l='MpServer', x=7.66, y=65.00, z=-269.59], uj['Slime'/425, l='MpServer', x=-29.63, y=62.00, z=-261.38], ui['Skeleton'/427, l='MpServer', x=-26.50, y=23.00, z=-166.50], ui['Skeleton'/429, l='MpServer', x=-28.09, y=24.00, z=-165.50], un['Zombie'/3168, l='MpServer', x=-50.03, y=63.00, z=-260.84], tj['item.item.rottenFlesh'/744, l='MpServer', x=-118.13, y=41.13, z=-227.13], tx['Enderman'/192, l='MpServer', x=-95.03, y=16.00, z=-220.47], sd['Bat'/2658, l='MpServer', x=-69.25, y=13.57, z=-163.25], sd['Bat'/2659, l='MpServer', x=-33.63, y=25.42, z=-311.44], bfn['mahamatan'/191, l='MpServer', x=-72.78, y=65.62, z=-242.27], uk['Spider'/2886, l='MpServer', x=-88.22, y=13.00, z=-219.94], sf['Chicken'/254, l='MpServer', x=-141.50, y=70.00, z=-277.50], sf['Chicken'/255, l='MpServer', x=-136.56, y=69.00, z=-282.44], sf['Chicken'/250, l='MpServer', x=-133.47, y=66.00, z=-304.69], sd['Bat'/3116, l='MpServer', x=-27.34, y=18.44, z=-238.50], sd['Bat'/3117, l='MpServer', x=-26.24, y=24.69, z=-236.30]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bfi.a(SourceFile:285)
at awb.b(SourceFile:1813)
at awb.e(SourceFile:651)
at net.minecraft.client.main.Main.main(SourceFile:103)
-- System Details --
Details:
Minecraft Version: 13w36b
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 279063392 bytes (266 MB) / 481689600 bytes (459 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 12846 (719376 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
Launched Version: 13w36b
LWJGL: 2.9.0
OpenGL: GeForce GT 430/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 2685 (150360 bytes; 0 MB) allocated, 15 (840 bytes; 0 MB) used
These screenshots were taken just before I forced the crash. One is at the tiny 'starting' resolution and the other is 'maximized', but not full-screen. This is a different world than the other screenshots, created with normal settings.
I can confirm this. Playing maximized causes a consistent drop in framerate.
Chris, my experience is that the following behavior exists:
Play at any resolution windowed other than 'maximized' in Windows and you get full FPS, up to the capabilities of your machine.
Play at any resolution fullscreen and you get full FPS, up to the capabilities of your machine.
Play at any resolution 'maximized' in Windows and you are arbitrarily limited to 15fps.
Can you confirm that's what's happening with your setup?
@ Mahamatan
I will test this as soon as I am done updating my graphics drivers. They keep reverting to using my integrated graphics in stead of dedicated, which may be related.
EDIT: Finally done with an absolutely HORRIBLE round of update-uninstall-reinstall between factory default drivers, AMD drivers, and Intel drivers so I was able to test this. In my case max FPS on normal render distance gave about 175 FPS at normal window size, 110 at nearly maximized, 85 at maximized, and 110 fullscreen. Maximized definitely had a serious impact on FPS. I am going to go test at far render distance and I will update with the numbers there.
EDIT2: Here it is with far: 130 normal window size, 120 somewhat enlarged, 100 nearly maximized, and 90 both maximized and fullscreen. It seems far render distance does not have the bug the same way. I will test with short/tiny and see what happens there.
EDIT3: On short the change was even more dramatic. 330 FPS normal size, 240 somewhat expanded, 170 nearly maximized, and 160 both fullscreen and maximized.
EDIT4: Tiny even more so: normal was 500 FPS (new record for me, even with optifine! Good job mojang!), somewhat maximized was 320, almost maximized 250, 190 maximized, and 180 fullscreen.
I hurt for your driver woes. Sounds like you've got a beefier rig than I do, though!
Your results are pretty consistent with what I'm seeing, although, I'm getting lower FPS all around, simply due to a less beefy rig.
Mrs. had her PC unused this evening, and she has a MC account/install on it, so I tested on hers. It's a slightly less beefy rig than mine. CPU is an AMD 7750, dual core 2.7ghz with 3 gb of Ram and an nvidia 9400GT.
On 'Far' render distance, I got the following FPS:
Tiny: 59fps
Near Maximized: 30fps
Maximized: 30fps
Full Screen 33fps
On 'Normal' render distance, I got the following FPS
Tiny: 60fps
Near Maximized: 60fps
Maximized: 30fps
Full Screen: 40fps
So, yeah, it definitely pops up with the 'Normal' render distance moreso than the 'far' render distance and will attempt to edit my original reproduction instructions to include setting render distance.
I forced a crash report, JIC.
---- Minecraft Crash Report ----
// I blame Dinnerbone.
Time: 9/9/13 10:40 PM
Description: Manually triggered debug crash
java.lang.Throwable
at awb.m(SourceFile:1282)
at awb.V(SourceFile:686)
at awb.e(SourceFile:642)
at net.minecraft.client.main.Main.main(SourceFile:103)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at bfi.a(SourceFile:285)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [bfn['terposa'/223, l='MpServer', x=-29.50, y=119.62, z=264.50]]
Chunk stats: MultiplayerChunkCache: 225, 225
Level seed: 0
Level generator: ID 03 - amplified, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-28,64,256), Chunk: (at 4,4,0 in -2,16; contains blocks -32,0,256 to -17,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 4626 game time, 4626 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 60 total; [tj['item.item.seeds'/137, l='MpServer', x=-7.44, y=98.13, z=280.50], sn['Pig'/136, l='MpServer', x=-6.53, y=98.00, z=275.41], tj['item.item.porkchopRaw'/138, l='MpServer', x=-7.88, y=98.13, z=280.22], sd['Bat'/143, l='MpServer', x=6.09, y=56.10, z=198.75], sg['Cow'/133, l='MpServer', x=-9.13, y=156.00, z=230.06], sg['Cow'/132, l='MpServer', x=-14.50, y=138.00, z=219.50], sn['Pig'/135, l='MpServer', x=-13.55, y=94.13, z=279.50], sg['Cow'/134, l='MpServer', x=-14.47, y=148.00, z=223.50], sd['Bat'/158, l='MpServer', x=45.08, y=20.11, z=244.17], sd['Bat'/147, l='MpServer', x=23.59, y=22.10, z=229.97], tj['item.tile.flower1.dandelion'/148, l='MpServer', x=22.88, y=126.13, z=271.13], tj['item.tile.flower1.dandelion'/149, l='MpServer', x=20.88, y=126.13, z=280.88], sd['Bat'/151, l='MpServer', x=24.61, y=50.76, z=301.91], sd['Bat'/442, l='MpServer', x=-91.79, y=43.87, z=304.75], sn['Pig'/163, l='MpServer', x=33.47, y=156.00, z=251.81], sn['Pig'/162, l='MpServer', x=31.66, y=159.00, z=244.53], sn['Pig'/161, l='MpServer', x=36.50, y=154.00, z=249.50], sn['Pig'/160, l='MpServer', x=37.50, y=153.00, z=249.50], sn['Pig'/51, l='MpServer', x=-109.50, y=86.00, z=342.31], sn['Pig'/68, l='MpServer', x=-90.50, y=140.00, z=291.50], sn['Pig'/69, l='MpServer', x=-89.50, y=138.00, z=293.50], sn['Pig'/70, l='MpServer', x=-92.50, y=164.00, z=290.50], sn['Pig'/71, l='MpServer', x=-90.50, y=194.00, z=289.50], sd['Bat'/336, l='MpServer', x=-36.25, y=43.10, z=191.50], sn['Pig'/67, l='MpServer', x=-84.59, y=191.00, z=248.53], sn['Pig'/72, l='MpServer', x=-86.38, y=90.00, z=339.13], sn['Pig'/85, l='MpServer', x=-74.50, y=88.00, z=342.50], sn['Pig'/84, l='MpServer', x=-78.34, y=194.00, z=245.53], sn['Pig'/87, l='MpServer', x=-74.50, y=88.00, z=342.50], sn['Pig'/86, l='MpServer', x=-72.50, y=91.00, z=340.50], sd['Bat'/459, l='MpServer', x=-51.16, y=37.19, z=235.88], sn['Pig'/83, l='MpServer', x=-76.50, y=193.00, z=250.50], sn['Pig'/82, l='MpServer', x=-75.47, y=191.00, z=248.53], sd['Bat'/335, l='MpServer', x=-26.06, y=42.01, z=189.63], sn['Pig'/95, l='MpServer', x=-49.19, y=164.00, z=242.19], sn['Pig'/94, l='MpServer', x=-57.47, y=161.00, z=244.53], sd['Bat'/373, l='MpServer', x=16.76, y=58.43, z=192.72], sn['Pig'/100, l='MpServer', x=-48.41, y=97.00, z=331.19], sn['Pig'/101, l='MpServer', x=-48.19, y=97.00, z=329.88], sn['Pig'/98, l='MpServer', x=-49.59, y=93.00, z=324.97], sn['Pig'/99, l='MpServer', x=-48.16, y=97.00, z=332.84], sn['Pig'/96, l='MpServer', x=-56.50, y=160.00, z=243.69], sn['Pig'/97, l='MpServer', x=-62.50, y=170.00, z=245.50], sd['Bat'/500, l='MpServer', x=35.25, y=24.92, z=225.34], sd['Bat'/502, l='MpServer', x=9.75, y=14.07, z=323.25], sd['Bat'/503, l='MpServer', x=3.41, y=17.79, z=326.50], sd['Bat'/106, l='MpServer', x=-35.25, y=43.10, z=197.25], bfn['terposa'/223, l='MpServer', x=-29.50, y=119.62, z=264.50], sg['Cow'/119, l='MpServer', x=-5.53, y=145.00, z=220.53], sn['Pig'/118, l='MpServer', x=-14.53, y=143.00, z=220.25], sn['Pig'/117, l='MpServer', x=-28.94, y=142.00, z=222.53], sn['Pig'/116, l='MpServer', x=-21.34, y=142.00, z=221.53], sd['Bat'/596, l='MpServer', x=-47.50, y=47.00, z=222.50], tj['item.item.porkchopRaw'/127, l='MpServer', x=-21.63, y=92.13, z=279.13], tj['item.tile.flower1.dandelion'/126, l='MpServer', x=-21.22, y=92.13, z=278.84], tj['item.tile.flower1.dandelion'/125, l='MpServer', x=-23.50, y=86.13, z=272.56], tj['item.tile.flower1.dandelion'/124, l='MpServer', x=-20.88, y=92.13, z=280.13], tj['item.tile.flower1.dandelion'/123, l='MpServer', x=-19.34, y=93.13, z=282.28], tj['item.tile.torch'/122, l='MpServer', x=-19.72, y=162.13, z=257.50], sn['Pig'/120, l='MpServer', x=-21.50, y=154.00, z=224.50]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bfi.a(SourceFile:285)
at awb.b(SourceFile:1813)
at awb.e(SourceFile:651)
at net.minecraft.client.main.Main.main(SourceFile:103)
-- System Details --
Details:
Minecraft Version: 13w36b
Operating System: Windows XP (x86) version 5.1
Java Version: 1.7.0_13, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 67843160 bytes (64 MB) / 235102208 bytes (224 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
AABB Pool Size: 780 (43680 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 13w36b
LWJGL: 2.9.0
OpenGL: GeForce 9400 GT/PCI/SSE2/3DNOW! GL version 3.3.0, NVIDIA Corporation
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1118 (62608 bytes; 0 MB) allocated, 13 (728 bytes; 0 MB) used
I can confirm this, too. I usually get around 60fps in 1.6 downwards. In the snapshot, it remains the same if the window is tiny. At maximized, I get only 30fps. At fullscreen, I get 33fps.
@Mahamatan
Actually I'm on a laptop with 1GB graphics. That is why I was so surprised at the FPS! On 1.6.2 with all settings on fancy I get around 30 FPS with vanilla, and 120 with optifine. Here on the same render distance I got 130 with vanilla! Also attaching a crash report. I can also confirm the bug where the launcher thinks the game is modded even though the crash report says it is not.

Is this still a concern in the current Snapshot ? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
I've just tested the latest 1.7 pre-release, this bug still occurs. However, it seems worse. I am now getting around 1-10fps and the game is pretty much unplayable.
I can confirm that this happens in 1.7 / 1.7.1. The snapshot before that was not NEARLY so bad. The frame-drop in 1.7.1 is bad enough to negate all the performance improvements that have been added since 1.6.4.

Is this still a concern in the latest Minecraft version 13w48b? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
@Ezekiel
This has not happened to me in any of the post-1.7.2 snapshots.

Resolved. If you experience this issue again in the future, please create a new ticket.
Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report (
[minecraft|http://hopper.minecraft.net/help/finding-minecraft-data-folder]/crash-reports/crash-<DATE>-client.txt
) here.