\t\t\t\tHere’s a class that given a predefined area of memory, allows you to allocate and deallocate areas of that memory. In other words, a custom memory manager.<\/p>\n
Only partially done yet, but it’s already 25% or so faster than malloc and free Full alloc, then dealloc<\/b> Fragmentation<\/b> Most of the speedup comes from linked lists of buckets. There are 7 buckets, from 32 bytes to 2048 bytes, incrementing in powers of two. 20% of the given memory is dedicated to buckets. If an allocation is requested and a bucket is available, the allocation goes to that bucket instead. Because buckets are contiguous and reserved, those allocations cannot cause fragmentation.<\/p>\n The alignment boundary is 32 bytes, so all allocations returned to the user are aligned, and the average memory wasted per allocation is 32 bytes, excluding buckets.<\/p>\n The speeds shown are with a critical section lock. This is not necessary, and for single threads it would be even faster.\t\t<\/p>\n","protected":false},"excerpt":{"rendered":" Here’s a class that given a predefined area of memory, allows you to allocate and deallocate areas of that memory. In other words, a custom memory manager. Only partially done yet, but it’s already 25% or so faster than malloc and free Header CPP Full alloc, then dealloc Heap = 1304 us malloc = 878256 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/posts\/369"}],"collection":[{"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=369"}],"version-history":[{"count":0,"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/posts\/369\/revisions"}],"wp:attachment":[{"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rakkar.org\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nHeader<\/a>
\nCPP<\/a><\/p>\n
\nHeap = 1304 us
\nmalloc = 878256 us<\/p>\n
\nHeap = 3525 us
\nmalloc = 4462 us<\/p>\n