Development idea: segmented save files

While waiting for a file to save, all of a sudden it struck me:
Save images as composites! Although there is a lot of metadata in a PSD, the layers can easily be separated, and why should we resave one, wasting CPU/disk I/O and time, when it hasn't changed? Apologies if you already realise this and have implemented it, but I want to go a step further.
Say we have a large file made up of 100 evenly spaced tiles. Then small edits to one of them does not require the whole to be resaved, saving up to 99% save time... Similarly, if only half change, we can still save a lot of time! They may not even need to be evenly spaced... Obviously then they can be combined in a compressed archive.
Not sure if Ps Dev team like the idea... can someone 'tag them' or how do I make them see it?

Well, but you still need to hold the pixels for preview in memory (and save it, when using maximum compatibility) and depending on how the actual internal data structures are organized it may in fact be even more resource consuming to look up the relevant data sections/ chunks and splice them out. Also you'd still need integrity tests to verify the data is saved and handled okay. That and of course that you could at least in part already mimic a similar workflow using smart objects. Still, doesn't really eliminate any of the previous. File I/O issues are really solved best by brute force - large transfer bandwidth, fast disks.
Mylenium

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Όνομα ελαττωματικής εφαρμογής Safari.exe, έκδοση 5.34.57.2, χρονική σήμανση 0x4f982b5e
Όνομα ελαττωματικής λειτουργικής μονάδας CoreGraphics.dll, έκδοση 1.87.0.0, χρονική σήμανση 0x4f9739a0
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Μετατόπιση σφάλματος: 0x0013a762
Αναγνωριστικό ελαττωματικής διεργασίας: 0x17f4
Χρόνος έναρξης ελαττωματικής εφαρμογής: 0x01cded6b09576023
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Διαδρομή ελλατωματικής λειτουργικής μονάδας:C:\Program Files\Safari\Apple Application Support\CoreGraphics.dll
Αναγνωριστικό αναφοράς:ebe64ac9-595e-11e2-a977-0016356671d1
System
Provider
[ Name]
Application Error
EventID
1000
[ Qualifiers]
0
Level
2
Task
100
Keywords
0x80000000000000
TimeCreated
[ SystemTime]
2013-01-08T06:45:00.000000000Z
EventRecordID
95609
Channel
Application
Computer
computername
Security
EventData
Safari.exe
5.34.57.2
4f982b5e
CoreGraphics.dll
1.87.0.0
4f9739a0
40000015
0013a762
17f4
01cded6b09576023
C:\Program Files\Safari\Safari.exe
C:\Program Files\Safari\Apple Application Support\CoreGraphics.dll
ebe64ac9-595e-11e2-a977-0016356671d1
and
Ελαττωματικός κάδος (bucket) 2970527469, τύπος 1
Όνομα συμβάντος: APPCRASH
Απόκριση: Δεν υπάρχει
Αναγνωριστικό Cab: 0
Υπογραφή προβλήματος:
P1: Safari.exe
P2: 5.34.57.2
P3: 4f982b5e
P4: CoreGraphics.dll
P5: 1.87.0.0
P6: 4f9739a0
P7: 40000015
P8: 0013a762
P9:
P10:
Συνημμένα αρχεία:
C:\Users\username\AppData\Local\Temp\WER51A.tmp.WERInternalMetadata.xml
Αυτά τα αρχεία μπορεί να είναι διαθέσιμα εδώ:
C:\Users\username\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_Saf ari.exe_e273f639ef3d86d52c9d8e15dd2b42dce3e78061_1f86213d
Σύμβολο ανάλυσης:
Επανέλεγχος για λύση: 0
Αναγνωριστικό αναφοράς: ebe64ac9-595e-11e2-a977-0016356671d1
Κατάσταση αναφοράς: 0
+
System
Provider
[ Name]
Windows Error Reporting
EventID
1001
[ Qualifiers]
0
Level
4
Task
0
Keywords
0x80000000000000
TimeCreated
[ SystemTime]
2013-01-08T06:45:10.000000000Z
EventRecordID
95610
Channel
Application
Computer
computername
Security
EventData
2970527469
1
APPCRASH
Δεν υπάρχει
0
Safari.exe
5.34.57.2
4f982b5e
CoreGraphics.dll
1.87.0.0
4f9739a0
40000015
0013a762
C:\Users\username\AppData\Local\Temp\WER51A.tmp.WERInternalMetadata.xml
C:\Users\username\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_Saf ari.exe_e273f639ef3d86d52c9d8e15dd2b42dce3e78061_1f86213d
0
ebe64ac9-595e-11e2-a977-0016356671d1
0
I have tried in-installing safari but it seems not to help. I have tried installing it to a third, newly installed pc and come to the same result.
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Still having the same problem. Ever the optimist, I submit the following info.
Error window screenshot can be found here: https://dl.dropboxusercontent.com/u/22465174/safari/safari_fail_01.JPG
Enent log entry can be found here: https://dl.dropboxusercontent.com/u/22465174/safari/safari_fail_02.txt
Version info can be found here: https://dl.dropboxusercontent.com/u/22465174/safari/safari_fail_03.JPG

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~CG
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