Tag: speed

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by: mmsmuhin
Created: —
Category: Link Building
Viewed: 234

Is Expeditious Retreat essentially a spell to double your speed?

I’m fairly new to DnD. I’m creating my first wizard and I’ve been wondering about the Expeditious Retreat spell.

The PHB says:

This spell allows you to move at an incredible pace. When you cast this spell, and then as a bonus action on each of your turns until the spell ends, you can take the Dash action.

Concerning the Dash action, the PHB says:

When you take the Dash action, you gain extra movement for the current turn. The increase equals your speed, after applying any modifiers.

My normal speed is 30 feet. So normally, during my turn in combat, I can move up to 30 feet and take one action (in any order, even splitting my movement up by moving 15 feet, taking an action, and moving another 15 feet, etc). Do I understand correctly that when I cast this spell and as long as it is active, I can essentially move up to 60 feet and take one action during my turn? That is, could the description of this spell be more simply (but equivalently) expressed as:

Your speed is doubled for the duration of this spell.

And if not, what would be the difference?

Kdenlive: Speed up the audio and video without losing pitch

I am using Kdenlive Version 17.12.3 in Ubuntu 18.04. I have increased the the speed of the video and it resulted in the pitch variation of audio. Is there any way to change the pitch? I even tried changing the speed and pitch of the audio outside using Audacity but no matter how hard I tried I couldn’t match the length of the audio and video after that.

How to speed up boot time on lubuntu

New to linux and ubuntu. I have shared my laptop info. Boot up time is sooooo slowwwww. Even lauch of firefox takes long time.

Can anyone help me figure out how to optimize my system?

Using Lubuntu (Ubuntu Version)

Command

$   lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description:    Ubuntu 18.04.2 LTS Release:    18.04 Codename:   bionic

Command

$   sudo lshw -short H/W path         Device     Class          Description ======================================================                             system         Aspire A515-51G (0000000000000000) /0                          bus            Charmander_KL /0/0                        memory         128KiB BIOS /0/4                        processor      Intel(R) Core(TM) i5-8250U CPU @ 1.60 /0/4/5                      memory         256KiB L1 cache /0/4/6                      memory         1MiB L2 cache /0/4/7                      memory         6MiB L3 cache /0/d                        memory         4GiB System Memory /0/d/0                      memory         4GiB SODIMM DDR4 Synchronous Unbuffer /0/d/1                      memory         [empty] /0/100                      bridge         Xeon E3-1200 v6/7th Gen Core Processo /0/100/2                    display        UHD Graphics 620 /0/100/14                   bus            Sunrise Point-LP USB 3.0 xHCI Control /0/100/14/0      usb1       bus            xHCI Host Controller /0/100/14/0/5               communication  Bluetooth wireless interface /0/100/14/0/7               multimedia     HD WebCam /0/100/14/1      usb2       bus            xHCI Host Controller /0/100/15                   generic        Sunrise Point-LP Serial IO I2C Contro /0/100/15.1                 generic        Sunrise Point-LP Serial IO I2C Contro /0/100/16                   communication  Sunrise Point-LP CSME HECI #1 /0/100/17                   storage        Sunrise Point-LP SATA Controller [AHC /0/100/1c                   bridge         Sunrise Point-LP PCI Express Root Por /0/100/1c/0                 display        GP108M [GeForce MX150] /0/100/1c.4                 bridge         Sunrise Point-LP PCI Express Root Por /0/100/1c.4/0               generic        RTL8411B PCI Express Card Reader /0/100/1c.4/0.1  enp2s0f1   network        RTL8111/8168/8411 PCI Express Gigabit /0/100/1c.5                 bridge         Sunrise Point-LP PCI Express Root Por /0/100/1c.5/0    wlp3s0     network        Dual Band Wireless-AC 3168NGW [Stone  /0/100/1f                   bridge         Intel(R) 100 Series Chipset Family LP /0/100/1f.2                 memory         Memory controller /0/100/1f.3                 multimedia     Sunrise Point-LP HD Audio /0/100/1f.4                 bus            Sunrise Point-LP SMBus /0/1             scsi0      storage         /0/1/0.0.0       /dev/sda   disk           1TB WDC WD10SPZX-21Z /0/1/0.0.0/1     /dev/sda1  volume         927GiB EXT4 volume /0/1/0.0.0/2     /dev/sda2  volume         3970MiB Extended partition /0/1/0.0.0/2/5   /dev/sda5  volume         3970MiB Linux swap volume

Used this command

$   systemd-analyze critical-chain The time after the unit is active or started is printed after the "@" character. The time the unit takes to start is printed after the "+" character.  graphical.target @1min 6.870s └─multi-user.target @1min 6.870s   └─kerneloops.service @1min 6.842s +26ms     └─network-online.target @1min 6.836s       └─NetworkManager-wait-online.service @58.305s +8.529s         └─NetworkManager.service @48.794s +9.507s           └─dbus.service @48.775s             └─basic.target @48.690s               └─sockets.target @48.690s                 └─snapd.socket @48.620s +69ms                   └─sysinit.target @48.618s                     └─systemd-timesyncd.service @48.458s +159ms                       └─systemd-tmpfiles-setup.service @47.215s +1.185s                         └─systemd-journal-flush.service @5.764s +41.448s                           └─systemd-remount-fs.service @4.325s +1.438s                             └─systemd-journald.socket @4.229s                               └─system.slice @4.229s                                 └─-.slice @4.170s

Saw this post Can we talk about the boot time on Ubuntu 18.04?

Ran 

$   systemd-analyze time Startup finished in 4.907s (kernel) + 7min 8.181s (userspace) = 7min 13.089s graphical.target reached after 1min 6.870s in userspace

Ran

$   service --status-all | grep '+' | wc -l 27

Minimizing code duplication without using macros or sacrificing speed

Here’s a snippet of code:

An inlined function:

inline void rayStep(const glm::vec3 &ray, float &rayLength, const glm::vec3 &distanceFactor, glm::ivec3 &currentVoxelCoordinates, const glm::ivec3 &raySign, const glm::ivec3 &rayPositive, glm::vec3 &positionInVoxel, const int smallestIndex) {     rayLength += distanceFactor[smallestIndex];     currentVoxelCoordinates[smallestIndex] += raySign[smallestIndex];     positionInVoxel += ray * glm::vec3(distanceFactor[smallestIndex]);     positionInVoxel[smallestIndex] = 1 - rayPositive[smallestIndex]; }

It’s usage:

glm::ivec3 distanceFactor = (glm::vec3(rayPositive) - positionInVoxel) / ray;      if (distanceFactor.x < distanceFactor.y)     {         if (distanceFactor.x < distanceFactor.z)         {             rayStep(ray, rayLength, distanceFactor, currentVoxelCoordinates, raySign, rayPositive, positionInVoxel, 0);         }         else         {             rayStep(ray, rayLength, distanceFactor, currentVoxelCoordinates, raySign, rayPositive, positionInVoxel, 2);         }     }     else     {         if (distanceFactor.y < distanceFactor.z)         {             rayStep(ray, rayLength, distanceFactor, currentVoxelCoordinates, raySign, rayPositive, positionInVoxel, 1);         }         else         {             rayStep(ray, rayLength, distanceFactor, currentVoxelCoordinates, raySign, rayPositive, positionInVoxel, 2);         }     }

I really dislike the way the usage of the function looks like. One way I could fix it is to calculate the index of the smallest component and then just use the body of the function directly in the code:

int smallestIndex = (distanceFactor.x < distanceFactor.y) ? (distanceFactor.x < distanceFactor.z ? 0 : 2) : (distanceFactor.y < distanceFactor.z ? 1 : 2); rayLength += distanceFactor[smallestIndex]; currentVoxelCoordinates[smallestIndex] += raySign[smallestIndex]; positionInVoxel += ray * glm::vec3(distanceFactor[smallestIndex]); positionInVoxel[smallestIndex] = 1 - rayPositive[smallestIndex];

This looks much cleaner to me.

So why haven’t I done that, if it bothers me so much?

The benefit of the above code is that value of the smallestComponentIndex of the function is know at compile time – the value is given as a constant and the function is inlined. This enables the compiler to do some optimizations which it wouldn’t be able to do if the value were unknown during the compile time – which is what happens in the example with double ternary operator.

The performance hit in my example is not small, the code goes from 30ms to about 45ms of execution time – that’s 50% increase.

This seems negligible, but this is a part of a simple ray tracer – if I want to scale it to do more complex calculations, I need this part to be as fast as possible, since it’s done once per ray intersection. This was run on low resolution with a single ray per pixel, with no light sources taken into account. A simple ray cast, really, hence the runtime of 30ish ms.

Is there any way I can have both the code expression and speed? Some nicer way to express what I want to do, while making sure that value of the smallestComponentIndex is known at compile time?

Speed up Comment formatting

I have recently added a subroutine, CleanUpComments, to be called from multiple other subroutines to clean up comment positions and sizes. It works, but it is extremely slow taking about 10 seconds to run through ~200 comments. I have indicated the code section that accounts for the delay.

Is there a better (faster) approach to reset the comment positions and sizes?

I also have included my subroutine, Updates_Off, that I use to turn off updates. (OBTW, the variables in this are all globals declared somewhere else.)

Am I missing anything that I should be turning off that would speed this up?

Thanks.

Public Sub CleanUpComments() ' v8b1: Added to modify all comments to: '           (1) move and size with cells '           (2) be physically positioned near the cell to which they correspond '           (3) be optimally sized appropriate to the text within '           This was created by combining code posted on the following website: '           http://www.contextures.com/xlcomments03.html      Dim CellComments As Comment     Dim lngArea As Long     Dim varReply As Variant  '''vv This accounts for the 10 second delay *******************************************     For Each CellComments In wsPlan.Comments         With CellComments.Shape             .Placement = xlMoveAndSize             .Top = CellComments.Parent.Top + 5             .Left = CellComments.Parent.Offset(0, 1).Left + 5             .TextFrame.Characters.Font.Name = "Tahoma"             .TextFrame.Characters.Font.Size = 8             .TextFrame.AutoSize = True         End With         If CellComments.Shape.Width > 200 Then             lngArea = CellComments.Shape.Width * CellComments.Shape.Height             CellComments.Shape.Width = 150             CellComments.Shape.Height = (lngArea / 150) * 1.1         End If     Next CellComments '''^^ This accounts for the 10 second delay *******************************************      UF_Caption = "SHOW COMMENTS"     UF_Label1Caption = "Do you wish to leave comments showing?"     UF_Height = 105     UF_TopOffset = 70      Call Updates_On     UF_QuestionYN.Show     varReply = UF_QuestionYN.Q_Reply     Unload UF_QuestionYN     Call Updates_Off      If varReply Then         Application.DisplayCommentIndicator = xlCommentAndIndicator     Else         Application.DisplayCommentIndicator = xlCommentIndicatorOnly     End If  End Sub   Public Sub Updates_Off()  ' Turn off Screen updating     Application.ScreenUpdating = False  ' Turn off Event tracking     Application.EnableEvents = False  ' Check what calculation mode is in effect and set current to manual     CalcMode = Application.Calculation     If CalcMode = xlCalculationManual Then _         MsgBox "Starting mode is manual"      IterationMode = Application.Iteration     Iterations = Application.MaxIterations     Application.Calculation = xlCalculationManual  End Sub

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by: SearchVision
Created: —
Category: WordPress
Viewed: 106