mirror of
https://github.com/golang/go
synced 2024-09-30 22:08:32 -06:00
c26fc88d56
The heap statistics were only written if asked for a profile with debug > 0, but that also prints a stack trace for each profile line, which is comparatively much noisier. The statistics are short enough and separate enough (they only appear at the end) and useful enough that we can print them always. This means that people using -test.memprofile in tests will get a memory profile with statistics included now. Pprof won't care, but if people care to look, the numbers will be there. This avoids the need for hacks like using -memprofilerate=1 to find the number of allocations. Change-Id: I10a4f593403d0315aad11b37c6e554b734caa73f Reviewed-on: https://go-review.googlesource.com/9491 Reviewed-by: David Chase <drchase@google.com>
131 lines
7.5 KiB
Plaintext
131 lines
7.5 KiB
Plaintext
Overall:
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toolchain in Go
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new GC
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Language:
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permit omission of key type in map composite literals where key is a composite literal (https://golang.org/cl/2591)
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Build:
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Go 1.4 required to build (https://golang.org/cl/2470, https://golang.org/cl/2993)
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New Ports:
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darwin/arm, a.k.a iOS. (https://golang.org/cl/2118, 2119, 3273, 2121, 2122, ..., 2127)
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darwin/arm64
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linux/arm64 (cgo is supported, but only with external linking)
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The port to Snow Leopard (OS X 10.6) is no longer actively maintained.
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Runtime:
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goroutine scheduling order changed; never guaranteed by language, but can break tests that implicitly assume a specific execution order
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Removed Ports:
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dragonfly/386 (https://golang.org/cl/7543)
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API additions and behavior changes:
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archive/zip: add (*Writer).SetOffset method (https://golang.org/cl/7445)
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bufio: add Reader.Discard (https://golang.org/cl/2260)
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bytes: add Buffer.Cap (https://golang.org/cl/8342)
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bytes, strings: add Reader.Size (https://golang.org/cl/3199)
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crypto/cipher: clarify what will happen if len(src) != len(dst) for the Stream interface. (https://golang.org/cl/1754)
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crypto/elliptic: add Name field to CurveParams struct (https://golang.org/cl/2133)
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crypto/elliptic: Unmarshaling points now automatically checks that the point is on the curve (https://golang.org/cl/2421)
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crypto/tls: change default minimum version to TLS 1.0. (https://golang.org/cl/1791)
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crypto/tls: including Certificate Transparency SCTs in the handshake is now supported (https://golang.org/cl/8988)
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crypto/tls: session ticket keys can now be rotated at runtime (https://golang.org/cl/9072)
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crypto/tls: servers will now always call GetCertificate to pick a certificate for a connection when Certificates is empty (https://golang.org/cl/8792)
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crypto/x509: wildcards are now only accepted as the first label (https://golang.org/cl/5691)
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crypto/x509: unknown critical extensions now cause errors in Verify, not when parsing (https://golang.org/cl/9390)
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database/sql: add Stats (https://golang.org/cl/7950)
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encoding/base64: add unpadded encodings (https://golang.org/cl/1511)
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flag: new nicer format for PrintDefaults (https://golang.org/cl/7330)
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fmt: empty slices now print nothing with %x (bug fix) (https://golang.org/cl/8864)
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fmt: reflect.Value now prints what it holds (https://golang.org/cl/8731)
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go/ast: add Implicit field to ast.EmptyStmt; changed meaning of ast.EmptyStmt.Semicolon position (https://golang.org/cl/5720)
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io: add CopyBuffer, Copy with user-provided buffer (https://golang.org/cl/8730)
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log: add SetOutput functions (https://golang.org/cl/2686, https://golang.org/cl/3023)
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log: add LUTC flag (https://golang.org/cl/8761)
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math/big: add arbitrary precision Floats (many cl's)
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mime: add ExtensionByType (https://golang.org/cl/7444)
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mime/quotedprintable: new package (https://golang.org/cl/5940 + others)
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net/http: support for setting trailers from a server Handler (https://golang.org/cl/2157)
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net/http: ignore the Unix epoch time in ServeContent (https://golang.org/cl/7915)
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net/http/cgi: fix REMOTE_ADDR, REMOTE_HOST, add REMOTE_PORT (https://golang.org/cl/4933)
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net/smtp: add TLSConnectionState accessor (https://golang.org/cl/2151)
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os/signal: add Ignore and Reset (https://golang.org/cl/3580)
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reflect: add ArrayOf (https://golang.org/cl/4111)
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reflect: add FuncOf (https://golang.org/cl/1996)
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runtime, syscall: use SYSCALL instruction on FreeBSD (Go 1.5 now requires FreeBSD 8-STABLE+) (https://golang.org/cl/3020)
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runtime, syscall: use get_random_bytes syscall for NaCl (Go 1.5 now requires NaCl SDK pepper-39 or above) (https://golang.org/cl/1755)
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runtime/pprof: memory profiles include overall memory statistics by default (https://golang.org/cl/9491)
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strings: add Compare(x, y string) int, for symmetry with bytes.Compare (https://golang.org/cl/2828)
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syscall: Add Foreground and Pgid to SysProcAttr (https://golang.org/cl/5130)
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syscall: add missing Syscall9 for darwin/amd64 (https://golang.org/cl/6555)
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testing/quick: support generation of arrays (https://golang.org/cl/3865)
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text/template: add Options method (https://golang.org/cl/8462)
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time: add time.AppendFormat(https://golang.org/cl/1760)
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Tools:
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build: external linking support for windows (https://golang.org/cl/7163, 7282, 7283, 7284, 7534, 7535)
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cmd/gc: constant arithmetic is based on math/big (https://golang.org/cl/7830, 7851, 7857, 8426, 7858, 7912, 8171)
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cmd/go, go/build: add ${SRCDIR} variable expansion to cgo lines (https://golang.org/cl/1756)
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cmd/go: add $DOLLAR to generate's variables (https://golang.org/cl/8091)
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cmd/go: std wildcard now excludes commands in main repo (https://golang.org/cl/5550)
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cmd/go: .swig/.swigcxx files now require SWIG 3.0.6 or later
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cmd/go: add -run flag to go generate (https://golang.org/cl/9005)
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cmd/go: add $GOLINE to generate's variables (https://golang.org/cl/9007)
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cmd/go: add go doc (https://golang.org/cl/9227)
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cmd/vet: better validation of struct tags (https://golang.org/cl/2685)
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cmd/ld: no longer record build timestamp in Windows PE file header (https://golang.org/cl/3740)
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cmd/go: add -toolexec build option
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cmd/go: drop -ccflags build option
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cmd/go: add -asmflags build option
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cmd/go: add -buildmode build option
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cmd/gc: add -dynlink option (for amd64 only)
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cmd/ld: add -buildmode option
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cmd/trace: new command to view traces (https://golang.org/cl/3601)
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Performance:
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cmd/gc: evaluate concrete == interface without allocating (https://golang.org/cl/2096)
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cmd/gc: optimize memclr of slices and arrays (https://golang.org/cl/2520)
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cmd/gc: transform closure calls to function calls (https://golang.org/cl/4050)
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cmd/gc: transitive inlining (https://golang.org/cl/5952)
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cmd/gc, runtime: speed up some cases of _, ok := i.(T) (https://golang.org/cl/7697)
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cmd/gc: speed up large string switches (https://golang.org/cl/7698)
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cmd/gc: inline x := y.(*T) and x, ok := y.(*T) (https://golang.org/cl/7862)
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cmd/gc: allocate backing storage for non-escaping interfaces on stack (https://golang.org/cl/8201)
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encoding/xml: avoid an allocation for tags without attributes (https://golang.org/cl/4160)
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image: many optimizations
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runtime: add ARM runtime.cmpstring and bytes.Compare (https://golang.org/cl/8010)
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sort: number of Sort performance optimizations (https://golang.org/cl/2100, https://golang.org/cl/2614, ...)
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strconv: optimize decimal to string conversion (https://golang.org/cl/2105)
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strconv: optimize float to string conversion (https://golang.org/cl/5600)
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sync: add active spinning to Mutex (https://golang.org/cl/5430)
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math/big: faster assembly kernels for amd64 and 386 (https://golang.org/cl/2503, https://golang.org/cl/2560)
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math/big: faster "pure Go" kernels for platforms w/o assembly kernels (https://golang.org/cl/2480)
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regexp: port RE2's bitstate backtracker to the regexp package (https://golang.org/cl/2153)
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Assembler:
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New cmd/asm tool (now use go tool asm, not go tool 6a)
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Assembler now supports -dynlink option.
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ARM assembly syntax has had some features removed.
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- mentioning SP or PC as a hardware register
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These are always pseudo-registers except that in some contexts
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they're not, and it's confusing because the context should not affect
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which register you mean. Change the references to the hardware
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registers to be explicit: R13 for SP, R15 for PC.
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- constant creation using assignment
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The files say a=b when they could instead say #define a b.
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There is no reason to have both mechanisms.
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- R(0) to refer to R0.
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Some macros use this to a great extent. Again, it's easy just to
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use a #define to rename a register.
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Also expression evaluation now uses uint64s instead of signed integers and the
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precedence of operators is now Go-like rather than C-like.
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