garbage-collection

问题 Given an object obj is there a guarantee that uintptr(unsafe.Pointer(&obj)) will always evaluate to the same value regardless of when it is called? Of course, Go guarantees that if you take two pointers to the same object, they will always compare equal. It might be possible though that an implementation moves an object in memory and transparently updates all pointers to it. This is interesting if you consider garbage collection strategies like Mark-and-Compact. Would an implementor be

问题 I am a newb, and I have read about Garbage Collection from the first two answers here. Now justifying the use of Immutable Objects even if the programmer has to create new objects, as compared to using existing objects (in multi-threaded applications), this tutorial says that the cost of object creation is made up for by the decrease in memory overhead due to garbage collection , and the elimination of code to protect mutable objects from threads interference and memory consistency errors:

问题 I am a newb, and I have read about Garbage Collection from the first two answers here. Now justifying the use of Immutable Objects even if the programmer has to create new objects, as compared to using existing objects (in multi-threaded applications), this tutorial says that the cost of object creation is made up for by the decrease in memory overhead due to garbage collection , and the elimination of code to protect mutable objects from threads interference and memory consistency errors:

问题 I am a newb, and I have read about Garbage Collection from the first two answers here. Now justifying the use of Immutable Objects even if the programmer has to create new objects, as compared to using existing objects (in multi-threaded applications), this tutorial says that the cost of object creation is made up for by the decrease in memory overhead due to garbage collection , and the elimination of code to protect mutable objects from threads interference and memory consistency errors:

问题 I am a newb, and I have read about Garbage Collection from the first two answers here. Now justifying the use of Immutable Objects even if the programmer has to create new objects, as compared to using existing objects (in multi-threaded applications), this tutorial says that the cost of object creation is made up for by the decrease in memory overhead due to garbage collection , and the elimination of code to protect mutable objects from threads interference and memory consistency errors:

问题 I am a newb, and I have read about Garbage Collection from the first two answers here. Now justifying the use of Immutable Objects even if the programmer has to create new objects, as compared to using existing objects (in multi-threaded applications), this tutorial says that the cost of object creation is made up for by the decrease in memory overhead due to garbage collection , and the elimination of code to protect mutable objects from threads interference and memory consistency errors:

问题 I understand the difference between new gen / old gen /perm gen, but I don't know what "To Space" and "From Space" are. I am seeing my "From Space" hitting 99.8% used while the "To Space" always seems to stay at 0% used. 回答1: Two regions in the garbage-collection algorithm that is used in the VM. Java specifics are found here: How Garbage Collection works in Java And a general explanation about "from space" and "to space": WP The most straightforward approach is the semi-space collector,

问题 I understand the difference between new gen / old gen /perm gen, but I don't know what "To Space" and "From Space" are. I am seeing my "From Space" hitting 99.8% used while the "To Space" always seems to stay at 0% used. 回答1: Two regions in the garbage-collection algorithm that is used in the VM. Java specifics are found here: How Garbage Collection works in Java And a general explanation about "from space" and "to space": WP The most straightforward approach is the semi-space collector,

问题 Analysing a heap dump I look for instances of java.lang.ref.Finalizer class. java.lang.ref.Finalizer has 'next' and 'prev' member fields for maintaining linked list. I always get FileInputStream as a tail of the list and FileOutputStream as previous entry to it (analysed several heap dumps). File descriptors for FileInputStream and FileOutputStream are always 0 and 1 respectively: +---[Pending Finalization] java.lang.ref.Finalizer | | | +---queue java.lang.ref.ReferenceQueue [Stack Local] | |

问题 I'm trying to understand how does golang's garbage collector work when the golang code is compiled and I guess when using go run as well. I figure go run is a little more straight forward and just runs the garbage collector along with the .go files you are running. But is the garbage collector compiled into the binaries as well when compiling to an executable? 回答1: The compiled object files do not contain any garbage collector "code". When a program is run with go run , the go command will