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https://issues.apache.org/jira/browse/BEAM-4726?focusedWorklogId=125390&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-125390
]
ASF GitHub Bot logged work on BEAM-4726:
----------------------------------------
Author: ASF GitHub Bot
Created on: 20/Jul/18 08:16
Start Date: 20/Jul/18 08:16
Worklog Time Spent: 10m
Work Description: herohde commented on a change in pull request #5882:
[BEAM-4726] Cache fixed per function Invoke values
URL: https://github.com/apache/beam/pull/5882#discussion_r203969101
##########
File path: sdks/go/pkg/beam/core/runtime/exec/fn.go
##########
@@ -125,10 +125,144 @@ func Invoke(ctx context.Context, ws []typex.Window, ts
typex.EventTime, fn *func
return nil, nil
}
+// InvokeWithoutEventTime runs the given function at time 0 in the global
window.
func InvokeWithoutEventTime(ctx context.Context, fn *funcx.Fn, opt *MainInput,
extra ...interface{}) (*FullValue, error) {
return Invoke(ctx, window.SingleGlobalWindow, mtime.ZeroTimestamp, fn,
opt, extra...)
}
+// invoker is a container struct for hot path invocations of DoFns, to avoid
+// repeating fixed set up per element.
+type invoker struct {
+ fn *funcx.Fn
+ args []interface{}
+ // TODO(lostluck): 2018/07/06 consider replacing with a slice of
functions to run over the args slice, as an improvement.
+ ctxIdx, wndIdx, etIdx int // specialized input indexes
+ outEtIdx, errIdx int // specialized output indexes
+ in, out []int // general indexes
+}
+
+func newInvoker(fn *funcx.Fn) *invoker {
+ n := &invoker{
+ fn: fn,
+ args: make([]interface{}, len(fn.Param)),
+ in: fn.Params(funcx.FnValue | funcx.FnIter | funcx.FnReIter |
funcx.FnEmit),
+ out: fn.Returns(funcx.RetValue),
+ }
+ var ok bool
+ if n.ctxIdx, ok = fn.Context(); !ok {
+ n.ctxIdx = -1
+ }
+ if n.wndIdx, ok = fn.Window(); !ok {
+ n.wndIdx = -1
+ }
+ if n.etIdx, ok = fn.EventTime(); !ok {
+ n.etIdx = -1
+ }
+ if n.outEtIdx, ok = fn.OutEventTime(); !ok {
+ n.outEtIdx = -1
+ }
+ if n.errIdx, ok = fn.Error(); !ok {
+ n.errIdx = -1
+ }
+ return n
+}
+
+// ClearArgs zeroes argument entries in the cached slice to allow values to be
garbage collected after the bundle ends.
+func (n *invoker) ClearArgs() {
+ for i := range n.args {
+ n.args[i] = nil
+ }
+}
+
+// Invoke invokes the fn with the given values. The extra values must match
the non-main
+// side input and emitters. It returns the direct output, if any.
+func (n *invoker) Invoke(ctx context.Context, ws []typex.Window, ts
typex.EventTime, opt *MainInput, extra ...interface{}) (*FullValue, error) {
Review comment:
I don't see them. Forgot to push a commit?
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Issue Time Tracking
-------------------
Worklog Id: (was: 125390)
Time Spent: 6h 20m (was: 6h 10m)
> Reduce ParDo per element Invoke overhead
> ----------------------------------------
>
> Key: BEAM-4726
> URL: https://issues.apache.org/jira/browse/BEAM-4726
> Project: Beam
> Issue Type: Sub-task
> Components: sdk-go
> Reporter: Robert Burke
> Assignee: Robert Burke
> Priority: Major
> Time Spent: 6h 20m
> Remaining Estimate: 0h
>
> Each call to invoke allocates a new args []interface{}, but the common case
> is to run the same ProcessElement function over and again. It should be
> possible to have a container struct to retain the args slice, and avoid
> recomputing the indices for where to assign parameters before calling the
> ProcessElementFn.
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