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Quick checkin to make sure I still have the mechanics straight in this 

directory.
This commit is contained in:
Tim Peters 2003-02-06 20:29:21 +00:00
parent 9b88421c6a
commit 21a586e1b3
1 changed files with 4 additions and 3 deletions
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7
pep-0307.txt
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@ -36,9 +36,7 @@ Introduction
Motivation Motivation
Pickling new-style objects causes serious pickle bloat. For Pickling new-style objects causes serious pickle bloat. For
example, the binary pickle for a classic object with one instance example,
variable takes up 33 bytes; a new-style object with one instance
variable takes up 86 bytes. This was measured as follows:
class C(object): # Omit "(object)" for classic class class C(object): # Omit "(object)" for classic class
pass pass
@ -46,6 +44,9 @@ Motivation
x.foo = 42 x.foo = 42
print len(pickle.dumps(x, 1)) print len(pickle.dumps(x, 1))
The binary pickle for the classic object consumed 33 bytes, and for
the new-style object 86 bytes.
The reasons for the bloat are complex, but are mostly caused by The reasons for the bloat are complex, but are mostly caused by
the fact that new-style objects use __reduce__ in order to be the fact that new-style objects use __reduce__ in order to be
picklable at all. After ample consideration we've concluded that picklable at all. After ample consideration we've concluded that