It would be significantly better to save image files in reverse order

Use case:
Scan enough pages for your XUbuntu to start dumping memory into swap
Save as image files

What happens:
You first wait for the last pages to be swapped out and first pages converted
You then wait for the opposite thing

What would be significantly better:
You can write later pages first, using the fact that it is already in the memory at the end

I believe that it can be done as easily as changing the line 224 in book.vala

from:
    for (var i = 0; i < n_pages; i++)
to:
    for (var i = n_pages; i >= ; --i)

But i cannot test it, being unable to compile

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: simple-scan 3.28.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-46.49-generic 4.15.18
Uname: Linux 4.15.0-46-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue Mar 12 17:51:03 2019
InstallationDate: Installed on 2018-11-24 (107 days ago)
InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: ASUSTeK COMPUTER INC. N76VB
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-46-generic root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=1
SourcePackage: simple-scan
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/24/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N76VB.205
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N76VB
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN76VB.205:bd05/24/2013:svnASUSTeKCOMPUTERINC.:pnN76VB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN76VB:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: N
dmi.product.name: N76VB
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.