| Overall: |
| - toolchain in Go |
| - new GC |
| - go tool asm, go tool compile, go tool link |
| - default output files changed: now file.o and a.out |
| |
| Language: |
| - permit omission of key type in map composite literals where key is a composite literal (https://golang.org/cl/2591) |
| |
| Build: |
| - Go 1.4 required to build (https://golang.org/cl/2470, https://golang.org/cl/2993) |
| |
| New Ports: |
| - darwin/arm, a.k.a iOS. (https://golang.org/cl/2118, 2119, 3273, 2121, 2122, ..., 2127) |
| - darwin/arm64 |
| - linux/arm64 (cgo is supported, but only with external linking) |
| - openbsd/arm (no cgo or external linking) |
| |
| Removed Ports: |
| - dragonfly/386 (https://golang.org/cl/7543) |
| - The port to Snow Leopard (OS X 10.6) is no longer actively maintained. |
| |
| Runtime: |
| - goroutine scheduling order changed; never guaranteed by language, |
| but can break tests that implicitly assume a specific execution |
| order |
| |
| API additions and behavior changes: |
| |
| archive/zip: add (*Writer).SetOffset method (https://golang.org/cl/7445) |
| bufio: add Reader.Discard (https://golang.org/cl/2260) |
| bytes: add Buffer.Cap (https://golang.org/cl/8342) |
| bytes, strings: add Reader.Size (https://golang.org/cl/3199) |
| bytes, strings: add LastIndexByte (https://golang.org/cl/9500) |
| crypto/cipher: clarify what will happen if len(src) != len(dst) for the Stream interface. (https://golang.org/cl/1754) |
| crypto/elliptic: add Name field to CurveParams struct (https://golang.org/cl/2133) |
| crypto/elliptic: Unmarshaling points now automatically checks that the point is on the curve (https://golang.org/cl/2421) |
| crypto/tls: change default minimum version to TLS 1.0. (https://golang.org/cl/1791) |
| crypto/tls: including Certificate Transparency SCTs in the handshake is now supported (https://golang.org/cl/8988) |
| crypto/tls: session ticket keys can now be rotated at runtime (https://golang.org/cl/9072) |
| crypto/tls: servers will now always call GetCertificate to pick a certificate for a connection when Certificates is empty (https://golang.org/cl/8792) |
| crypto/x509: wildcards are now only accepted as the first label (https://golang.org/cl/5691) |
| crypto/x509: unknown critical extensions now cause errors in Verify, not when parsing (https://golang.org/cl/9390) |
| database/sql: add Stats (https://golang.org/cl/7950) |
| encoding/base64: add unpadded encodings (https://golang.org/cl/1511) |
| flag: new nicer format for PrintDefaults (https://golang.org/cl/7330) |
| fmt: empty slices now print nothing with %x (bug fix) (https://golang.org/cl/8864) |
| fmt: reflect.Value now prints what it holds (https://golang.org/cl/8731) |
| go/ast: add Implicit field to ast.EmptyStmt; changed meaning of ast.EmptyStmt.Semicolon position (https://golang.org/cl/5720) |
| go/build: reserved GOARCHes for common architectures (https://golang.org/cl/9644) |
| io: add CopyBuffer, Copy with user-provided buffer (https://golang.org/cl/8730) |
| log: add SetOutput functions (https://golang.org/cl/2686, https://golang.org/cl/3023) |
| log: add LUTC flag (https://golang.org/cl/8761) |
| math/big: add arbitrary precision Floats (many cl's) |
| math/big: add Jacobi and Int.ModSqrt (https://golang.org/cl/1886) |
| mime: add ExtensionByType (https://golang.org/cl/7444) |
| mime/quotedprintable: new package (https://golang.org/cl/5940 + others) |
| net: add Source field to OpError (https://go-review.googlesource.com/9231) |
| net: fix inconsistent errors (https://golang.org/cl/9236) |
| net: add SocketConn, SocketPacketConn (https://golang.org/cl/9275) |
| net: use Go's DNS resolver when system configuration permits (https://golang.org/cl/8945) |
| net/http: support for setting trailers from a server Handler (https://golang.org/cl/2157) |
| net/http: ignore the Unix epoch time in ServeContent (https://golang.org/cl/7915) |
| net/http/cgi: fix REMOTE_ADDR, REMOTE_HOST, add REMOTE_PORT (https://golang.org/cl/4933) |
| net/mail: adds AddressParser type (https://golang.org/cl/10392) |
| net/smtp: add TLSConnectionState accessor (https://golang.org/cl/2151) |
| os: add LookupEnv (https://golang.org/cl/9791) |
| os/signal: add Ignore and Reset (https://golang.org/cl/3580) |
| reflect: add ArrayOf (https://golang.org/cl/4111) |
| reflect: add FuncOf (https://golang.org/cl/1996) |
| runtime, syscall: use SYSCALL instruction on FreeBSD (Go 1.5 now requires FreeBSD 8-STABLE+) (https://golang.org/cl/3020) |
| 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) |
| runtime/pprof: memory profiles include overall memory statistics by default (https://golang.org/cl/9491) |
| strings: add Compare(x, y string) int, for symmetry with bytes.Compare (https://golang.org/cl/2828) |
| syscall: Add Foreground and Pgid to SysProcAttr (https://golang.org/cl/5130) |
| syscall: add missing Syscall9 for darwin/amd64 (https://golang.org/cl/6555) |
| testing/quick: support generation of arrays (https://golang.org/cl/3865) |
| text/template: add Options method (https://golang.org/cl/8462) |
| text/template: huge integers are now parse errors (https://golang.org/cl/9651) |
| time: add time.AppendFormat(https://golang.org/cl/1760) |
| |
| Tools: |
| |
| build: external linking support for windows (https://golang.org/cl/7163, 7282, 7283, 7284, 7534, 7535) |
| cmd/cover: tool now lives in the standard repository (https://golang.org/cl/9560) |
| cmd/gc: constant arithmetic is based on math/big (https://golang.org/cl/7830, 7851, 7857, 8426, 7858, 7912, 8171) |
| cmd/go, go/build: add ${SRCDIR} variable expansion to cgo lines (https://golang.org/cl/1756) |
| cmd/go: add $DOLLAR to generate's variables (https://golang.org/cl/8091) |
| cmd/go: std wildcard now excludes commands in main repo (https://golang.org/cl/5550) |
| cmd/go: .swig/.swigcxx files now require SWIG 3.0.6 or later |
| cmd/go: add -run flag to go generate (https://golang.org/cl/9005) |
| cmd/go: add $GOLINE to generate's variables (https://golang.org/cl/9007) |
| cmd/go: add go doc (https://golang.org/cl/9227) |
| cmd/vet: better validation of struct tags (https://golang.org/cl/2685) |
| cmd/ld: no longer record build timestamp in Windows PE file header (https://golang.org/cl/3740) |
| cmd/go: add -toolexec build option |
| cmd/go: drop -ccflags build option |
| cmd/go: add -asmflags build option |
| cmd/go: add -buildmode build option |
| cmd/gc: add -dynlink option (for amd64 only) |
| cmd/ld: add -buildmode option |
| cmd/trace: new command to view traces (https://golang.org/cl/3601) |
| |
| Performance: |
| |
| cmd/gc: evaluate concrete == interface without allocating (https://golang.org/cl/2096) |
| cmd/gc: optimize memclr of slices and arrays (https://golang.org/cl/2520) |
| cmd/gc: transform closure calls to function calls (https://golang.org/cl/4050) |
| cmd/gc: transitive inlining (https://golang.org/cl/5952) |
| cmd/gc, runtime: speed up some cases of _, ok := i.(T) (https://golang.org/cl/7697) |
| cmd/gc: speed up large string switches (https://golang.org/cl/7698) |
| cmd/gc: inline x := y.(*T) and x, ok := y.(*T) (https://golang.org/cl/7862) |
| cmd/gc: allocate backing storage for non-escaping interfaces on stack (https://golang.org/cl/8201) |
| encoding/xml: avoid an allocation for tags without attributes (https://golang.org/cl/4160) |
| image: many optimizations |
| runtime: add ARM runtime.cmpstring and bytes.Compare (https://golang.org/cl/8010) |
| runtime: do not scan maps when k/v do not contain pointers (https://golang.org/cl/3288) |
| runtime: reduce thrashing of gs between ps (https://golang.org/cl/9872) |
| sort: number of Sort performance optimizations (https://golang.org/cl/2100, https://golang.org/cl/2614, ...) |
| strconv: optimize decimal to string conversion (https://golang.org/cl/2105) |
| strconv: optimize float to string conversion (https://golang.org/cl/5600) |
| sync: add active spinning to Mutex (https://golang.org/cl/5430) |
| math/big: faster assembly kernels for amd64 and 386 (https://golang.org/cl/2503, https://golang.org/cl/2560) |
| math/big: faster "pure Go" kernels for platforms w/o assembly kernels (https://golang.org/cl/2480) |
| regexp: port RE2's bitstate backtracker to the regexp package (https://golang.org/cl/2153) |
| |
| Assembler: |
| |
| New cmd/asm tool (now use go tool asm, not go tool 6a) |
| |
| Assembler now supports -dynlink option. |
| |
| ARM assembly syntax has had some features removed. |
| |
| - mentioning SP or PC as a hardware register |
| These are always pseudo-registers except that in some contexts |
| they're not, and it's confusing because the context should not affect |
| which register you mean. Change the references to the hardware |
| registers to be explicit: R13 for SP, R15 for PC. |
| - constant creation using assignment |
| The files say a=b when they could instead say #define a b. |
| There is no reason to have both mechanisms. |
| - R(0) to refer to R0. |
| Some macros use this to a great extent. Again, it's easy just to |
| use a #define to rename a register. |
| |
| Also expression evaluation now uses uint64s instead of signed integers and the |
| precedence of operators is now Go-like rather than C-like. |
